Population - Revision history

76561199014279152: /* Population Growth */

2026-09-18T16:22:19Z

Population Growth

← Older revision		Revision as of 16:22, 18 September 2026
Line 38:		Line 38:
	Population is one of the hardest nation stats to change - aside from killing people in warfare, population grows (or shrinks) at a slow rate over time, and the player only has limited and indirect control over this process.		Population is one of the hardest nation stats to change - aside from killing people in warfare, population grows (or shrinks) at a slow rate over time, and the player only has limited and indirect control over this process.

	As of Version ~~RC6~~, the game calculates the annual {{TV\|pop}} growth of a region as follows:		As of Version 1.0.60, the game calculates the annual {{TV\|pop}} growth of a region as follows:

	<pre>		<pre>
	// PavonisInteractive.TerraInvicta.TIRegionState		// PavonisInteractive.TerraInvicta.TIRegionState
	public double annualPopulationGrowth		public double annualPopulationGrowth
	{		{
	get		get
	{		{
	double num = 4.49788037409348;		float populationRegressionPeriod_years = GameStateManager.Time().template.populationRegressionPeriod_years;
	return Mathd.Max(Mathd.Clamp(num + Mathd.Max(-num, -0.418190741 * (double)this.nation.education) + -0.0624798523403752 * (double)this.nation.cohesion + 9.80843732089162E-06 * (double)Mathf.Min(180000f, this.nation.perCapitaGDP) + -0.115739931206548 * (double)Mathf.Sqrt(Mathf.Abs(this.latitude)) + (double)(this.annualPopGrowthModifier * Mathf.Max(0f, (~~25f~~ - TITimeState.CampaignDuration_years_Exact()) / ~~25f~~)) + (double)this.nation.template.popGrowthModifier - (double)(this.xenoforming.xenoformingLevel / 200f) - (double)(this.nuclearDetonations * 4), -10.0, 10.0) - (double)(Math.Max(0f, Mathf.Abs(GameStateManager.GlobalValues().temperatureAnomaly_C) - 8f) * ((this.template.environment == EnvironmentType.Beneficiary) ? 0.5f : ((this.template.environment == EnvironmentType.Vulnerable) ? 2f : 1f))), -100.0) * 0.01;		double num = 4.49788037409348;
	}		return Mathd.Max(Mathd.Clamp(num + Mathd.Max(-num, -0.418190741 * (double)this.nation.education) + -0.0624798523403752 * (double)this.nation.cohesion + 9.80843732089162E-06 * (double)Mathf.Min(180000f, this.nation.perCapitaGDP) + -0.115739931206548 * (double)Mathf.Sqrt(Mathf.Abs(this.latitude)) + (double)(this.annualPopGrowthModifier * Mathf.Max(0f, (populationRegressionPeriod_years - TITimeState.CampaignDuration_years_Exact()) / populationRegressionPeriod_years)) + (double)this.nation.template.popGrowthModifier - (double)(this.xenoforming.xenoformingLevel / 200f) - (double)(this.nuclearDetonations * 4), -10.0, 10.0) - (double)(Math.Max(0f, Mathf.Abs(GameStateManager.GlobalValues().temperatureAnomaly_C) - 8f) * ((this.template.environment == EnvironmentType.Beneficiary) ? 0.5f : ((this.template.environment == EnvironmentType.Vulnerable) ? 2f : 1f))), -100.0) * 0.01;
	}		}
			}
	</pre>		</pre>

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	* Distance from the equator decreases pop growth by 0.115739931206548% multiplied by the square root of the absolute latitude of the region. (For specific values, see [[Region List]].)		* Distance from the equator decreases pop growth by 0.115739931206548% multiplied by the square root of the absolute latitude of the region. (For specific values, see [[Region List]].)
	* Every nation and region has a pop growth modifier, which is defined in plain text in [[TINationTemplate CSV\|TINationTemplate.json]] and [[Region List\|TIRegionTemplate.json]] in the game files. These values are added directly to the annual pop growth.		* Every nation and region has a pop growth modifier, which is defined in plain text in [[TINationTemplate CSV\|TINationTemplate.json]] and [[Region List\|TIRegionTemplate.json]] in the game files. These values are added directly to the annual pop growth.
	** Region pop growth modifiers slowly ~~fades~~ away over ~~time~~, ~~becoming 4% weaker each year until they are completely removed after 25~~ years.		** Region pop growth modifiers slowly fade away over <code>populationRegressionPeriod_years</code> years. On default settings, this is 20 years.
	* [[Aliens#Alien Xenoforming\|Xenoflora]] decreases pop growth by -1% per 200 levels of xenoflora growth.		* [[Aliens#Alien Xenoforming\|Xenoflora]] decreases pop growth by -1% per 200 levels of xenoflora growth.
	** For reference, whenever xenoflora growth exceeds 100 levels, 50 levels are spent to spawn a [[Aliens#Megafauna\|megafauna]], so this will rarely exceed an impact of -0.5% growth rate.		** For reference, whenever xenoflora growth exceeds 100 levels, 50 levels are spent to spawn a [[Aliens#Megafauna\|megafauna]], so this will rarely exceed an impact of -0.5% growth rate.

76561198017060882: /* Population Scaling for Nation Stat Changes */ Added Broken Earth info

2026-09-16T01:19:30Z

Population Scaling for Nation Stat Changes: Added Broken Earth info

← Older revision		Revision as of 01:19, 16 September 2026
Line 20:		Line 20:
	* {{TV\|sustainability}}		* {{TV\|sustainability}}

	As a result, most changes to these stats are slowed down in nations with larger pop. Specifically, the amount of change is divided by (pop / 50 million) ^ 0.35. This means that changes will happen at the "standard" rate in a nation of 50 million, faster in a smaller nation, and slower in a larger nation. Some examples from the [[2026]] scenario are:		As a result, most changes to these stats are slowed down in nations with larger pop. Specifically, the amount of change is divided by:
			* (pop / 50 million) ^ 0.35 in the {{TV\|2022}}, {{TV\|2026}}, {{TV\|2070}}, and {{TV\|2003}} [[scenarios]], or
			* (pop / 50 million) ^ 0.30 in the {{TV\|Broken Earth}} scenario.

			This means that changes will happen at the "standard" rate in a nation of 50 million, faster in a smaller nation, and slower in a larger nation. Some examples from the [[2026]] scenario are:
	* {{icon\|IND}}[[IND\|India]] (1476.63 M {{icon\|pop}}): 30.6% change speed		* {{icon\|IND}}[[IND\|India]] (1476.63 M {{icon\|pop}}): 30.6% change speed
	* {{icon\|USA}}[[USA\|United States]] (349.04 M {{icon\|pop}}): 50.6% change speed		* {{icon\|USA}}[[USA\|United States]] (349.04 M {{icon\|pop}}): 50.6% change speed
Line 26:		Line 30:
	* {{icon\|SGP}}[[SGP\|Singapore]] (5.91 M {{icon\|pop}}): 211.1% change speed		* {{icon\|SGP}}[[SGP\|Singapore]] (5.91 M {{icon\|pop}}): 211.1% change speed
	* {{icon\|SYC}}[[SYC\|Seychelles]] (0.13 M {{icon\|pop}}): 803.1% change speed		* {{icon\|SYC}}[[SYC\|Seychelles]] (0.13 M {{icon\|pop}}): 803.1% change speed

			The difference in the Broken Earth scenario is relatively small in practice - a BE country with the same population as 2026 India would go from 30.6% to 36.2%, and a BE country with the same population as the 2026 Seychelles would go from 803.1% to 596.3%.

	Consequently, two nations with different population but otherwise identical stats would usually develop themselves at the same rate.		Consequently, two nations with different population but otherwise identical stats would usually develop themselves at the same rate.


	== Population Growth ==		== Population Growth ==

76561198017060882: Moved content from Nations page to here.

2026-09-15T02:12:38Z

Moved content from Nations page to here.

← Older revision		Revision as of 02:12, 15 September 2026
Line 1:		Line 1:
	#~~REDIRECT~~ [[Nations#Population]]		[[Nations]] are composed of [[regions]] that each have {{TV\|pop}} (sometimes referred to as "pop") measured in millions. The total population of a nation is one of its most important stats, as pop has significant effects on nearly all other stats, including but not limited to:
			* {{TV\|IP}}.
			* {{icon\|research\|bgcolor=DarkSlateGray}}[[Nations#Research\|Research output]].
			* The maximum amount of {{icon\|mc\|bgcolor=DarkSlateGray}}[[Nations#Mission_Control\|Mission Control Cap]] that can be built in each region.
			* The maximum amount of {{TV\|armies}} that the nation can build.
			* {{TV\|Cohesion}}.
			* {{TV\|influence}} income from [[Nations#Public_Opinion\|public support]].
			* {{icon\|sustainability}}[[Climate_Change#Greenhouse_Gas_(GHG)_Sources\|Pollution output]] and pollution removal from the {{TV\|environment}}.

			As a result, nations with larger populations tend to have far greater long-term potential. On the other hand, nations with larger populations are also slower to change their nation stats, because of the need to apply these changes to a larger number of people.

			== Population Scaling for Nation Stat Changes ==
			The following nation stats are considered to apply to the entire population of the nation:
			* {{TV\|democracy}}
			* {{TV\|unrest}}
			* {{TV\|cohesion}}
			* {{TV\|inequality}}
			* {{TV\|gdppc}}
			* {{TV\|education}}
			* {{TV\|sustainability}}

			As a result, most changes to these stats are slowed down in nations with larger pop. Specifically, the amount of change is divided by (pop / 50 million) ^ 0.35. This means that changes will happen at the "standard" rate in a nation of 50 million, faster in a smaller nation, and slower in a larger nation. Some examples from the [[2026]] scenario are:
			* {{icon\|IND}}[[IND\|India]] (1476.63 M {{icon\|pop}}): 30.6% change speed
			* {{icon\|USA}}[[USA\|United States]] (349.04 M {{icon\|pop}}): 50.6% change speed
			* {{icon\|EUA}}[[EUA\|France]] (69.64 M {{icon\|pop}}): 89.1% change speed
			* {{icon\|SGP}}[[SGP\|Singapore]] (5.91 M {{icon\|pop}}): 211.1% change speed
			* {{icon\|SYC}}[[SYC\|Seychelles]] (0.13 M {{icon\|pop}}): 803.1% change speed

			Consequently, two nations with different population but otherwise identical stats would usually develop themselves at the same rate.


			== Population Growth ==
			Population is one of the hardest nation stats to change - aside from killing people in warfare, population grows (or shrinks) at a slow rate over time, and the player only has limited and indirect control over this process.

			As of Version RC6, the game calculates the annual {{TV\|pop}} growth of a region as follows:

			<pre>
			// PavonisInteractive.TerraInvicta.TIRegionState
			public double annualPopulationGrowth
			{
			get
			{
			double num = 4.49788037409348;
			return Mathd.Max(Mathd.Clamp(num + Mathd.Max(-num, -0.418190741 * (double)this.nation.education) + -0.0624798523403752 * (double)this.nation.cohesion + 9.80843732089162E-06 * (double)Mathf.Min(180000f, this.nation.perCapitaGDP) + -0.115739931206548 * (double)Mathf.Sqrt(Mathf.Abs(this.latitude)) + (double)(this.annualPopGrowthModifier * Mathf.Max(0f, (25f - TITimeState.CampaignDuration_years_Exact()) / 25f)) + (double)this.nation.template.popGrowthModifier - (double)(this.xenoforming.xenoformingLevel / 200f) - (double)(this.nuclearDetonations * 4), -10.0, 10.0) - (double)(Math.Max(0f, Mathf.Abs(GameStateManager.GlobalValues().temperatureAnomaly_C) - 8f) * ((this.template.environment == EnvironmentType.Beneficiary) ? 0.5f : ((this.template.environment == EnvironmentType.Vulnerable) ? 2f : 1f))), -100.0) * 0.01;
			}
			}
			</pre>

			WHAT THAT MEANS:
			* Lower {{TV\|education}} increases pop growth by roughly 0.42% for each point of education below roughly 11, up to a maximum of roughly 4.08%.
			* Higher {{TV\|cohesion}} decreases pop growth by roughly 0.06% for each point of cohesion, up to a maximum of roughly 0.62%.
			* Higher {{TV\|gdppc}} increases pop growth by roughly 0.098% for every 10k GDP per capita, up to a maximum of roughly 1.77%.
			* Distance from the equator decreases pop growth by 0.115739931206548% multiplied by the square root of the absolute latitude of the region. (For specific values, see [[Region List]].)
			* Every nation and region has a pop growth modifier, which is defined in plain text in [[TINationTemplate CSV\|TINationTemplate.json]] and [[Region List\|TIRegionTemplate.json]] in the game files. These values are added directly to the annual pop growth.
			** Region pop growth modifiers slowly fades away over time, becoming 4% weaker each year until they are completely removed after 25 years.
			* [[Aliens#Alien Xenoforming\|Xenoflora]] decreases pop growth by -1% per 200 levels of xenoflora growth.
			** For reference, whenever xenoflora growth exceeds 100 levels, 50 levels are spent to spawn a [[Aliens#Megafauna\|megafauna]], so this will rarely exceed an impact of -0.5% growth rate.
			* Nuclear fallout decreases pop growth by 4% per layer of nuclear fallout. These can be removed through massive investments into the {{TV\|environment}}.

			The above effects are summed up and then capped between -10% and +10% annual pop growth.

			Then the effects of severe [[Climate Change]] are applied:
			* For every degree of temperature anomaly above or below 8 degrees, population growth decreases by 1%.
			* This effect is doubled for {{icon\|ecologically vulnerable region\|bgcolor=DarkSlateGray}}ecologically vulnerable regions.
			* This effect is halved for {{icon\|ecologically protected region}}ecologically protected regions.

			At the start of every month, the population of every region is changed to match its projected annual pop growth rate. But a small amount of randomization between -0.0412% and +0.0412% is also added to this monthly pop change.

			If the region population decreases, the nation's {{TV\|education}} does too. If you lose more than 0.5 million population in a single month (no, it does not scale with total pop), you get the maximum reduction of -0.005 {{TV\|education}}. This can add up quickly in a large nation with many regions, each reducing the {{TV\|education}} by a maximum of -0.005 every month.

			Note: This {{TV\|education}} decrease is only applied by the automatic monthly pop change. Loss of pop from other sources such as [[Terrestrial_Warfare\|war]] or [[Events\|natural disasters]] has no effect on {{TV\|education}}.

76561198017060882: Made redirect.

2026-09-14T03:45:08Z

Made redirect.

New page

#REDIRECT [[Nations#Population]]

← Older revision		Revision as of 02:12, 15 September 2026
Line 1:		Line 1:
	#~~REDIRECT~~ [[Nations#Population]]		[[Nations]] are composed of [[regions]] that each have {{TV\|pop}} (sometimes referred to as "pop") measured in millions. The total population of a nation is one of its most important stats, as pop has significant effects on nearly all other stats, including but not limited to:
			* {{TV\|IP}}.
			* {{icon\|research\|bgcolor=DarkSlateGray}}[[Nations#Research\|Research output]].
			* The maximum amount of {{icon\|mc\|bgcolor=DarkSlateGray}}[[Nations#Mission_Control\|Mission Control Cap]] that can be built in each region.
			* The maximum amount of {{TV\|armies}} that the nation can build.
			* {{TV\|Cohesion}}.
			* {{TV\|influence}} income from [[Nations#Public_Opinion\|public support]].
			* {{icon\|sustainability}}[[Climate_Change#Greenhouse_Gas_(GHG)_Sources\|Pollution output]] and pollution removal from the {{TV\|environment}}.

			As a result, nations with larger populations tend to have far greater long-term potential. On the other hand, nations with larger populations are also slower to change their nation stats, because of the need to apply these changes to a larger number of people.

			== Population Scaling for Nation Stat Changes ==
			The following nation stats are considered to apply to the entire population of the nation:
			* {{TV\|democracy}}
			* {{TV\|unrest}}
			* {{TV\|cohesion}}
			* {{TV\|inequality}}
			* {{TV\|gdppc}}
			* {{TV\|education}}
			* {{TV\|sustainability}}

			As a result, most changes to these stats are slowed down in nations with larger pop. Specifically, the amount of change is divided by (pop / 50 million) ^ 0.35. This means that changes will happen at the "standard" rate in a nation of 50 million, faster in a smaller nation, and slower in a larger nation. Some examples from the [[2026]] scenario are:
			* {{icon\|IND}}[[IND\|India]] (1476.63 M {{icon\|pop}}): 30.6% change speed
			* {{icon\|USA}}[[USA\|United States]] (349.04 M {{icon\|pop}}): 50.6% change speed
			* {{icon\|EUA}}[[EUA\|France]] (69.64 M {{icon\|pop}}): 89.1% change speed
			* {{icon\|SGP}}[[SGP\|Singapore]] (5.91 M {{icon\|pop}}): 211.1% change speed
			* {{icon\|SYC}}[[SYC\|Seychelles]] (0.13 M {{icon\|pop}}): 803.1% change speed

			Consequently, two nations with different population but otherwise identical stats would usually develop themselves at the same rate.


			== Population Growth ==
			Population is one of the hardest nation stats to change - aside from killing people in warfare, population grows (or shrinks) at a slow rate over time, and the player only has limited and indirect control over this process.

			As of Version RC6, the game calculates the annual {{TV\|pop}} growth of a region as follows:

			<pre>
			// PavonisInteractive.TerraInvicta.TIRegionState
			public double annualPopulationGrowth
			{
			get
			{
			double num = 4.49788037409348;
			return Mathd.Max(Mathd.Clamp(num + Mathd.Max(-num, -0.418190741 * (double)this.nation.education) + -0.0624798523403752 * (double)this.nation.cohesion + 9.80843732089162E-06 * (double)Mathf.Min(180000f, this.nation.perCapitaGDP) + -0.115739931206548 * (double)Mathf.Sqrt(Mathf.Abs(this.latitude)) + (double)(this.annualPopGrowthModifier * Mathf.Max(0f, (25f - TITimeState.CampaignDuration_years_Exact()) / 25f)) + (double)this.nation.template.popGrowthModifier - (double)(this.xenoforming.xenoformingLevel / 200f) - (double)(this.nuclearDetonations * 4), -10.0, 10.0) - (double)(Math.Max(0f, Mathf.Abs(GameStateManager.GlobalValues().temperatureAnomaly_C) - 8f) * ((this.template.environment == EnvironmentType.Beneficiary) ? 0.5f : ((this.template.environment == EnvironmentType.Vulnerable) ? 2f : 1f))), -100.0) * 0.01;
			}
			}
			</pre>

			WHAT THAT MEANS:
			* Lower {{TV\|education}} increases pop growth by roughly 0.42% for each point of education below roughly 11, up to a maximum of roughly 4.08%.
			* Higher {{TV\|cohesion}} decreases pop growth by roughly 0.06% for each point of cohesion, up to a maximum of roughly 0.62%.
			* Higher {{TV\|gdppc}} increases pop growth by roughly 0.098% for every 10k GDP per capita, up to a maximum of roughly 1.77%.
			* Distance from the equator decreases pop growth by 0.115739931206548% multiplied by the square root of the absolute latitude of the region. (For specific values, see [[Region List]].)
			* Every nation and region has a pop growth modifier, which is defined in plain text in [[TINationTemplate CSV\|TINationTemplate.json]] and [[Region List\|TIRegionTemplate.json]] in the game files. These values are added directly to the annual pop growth.
			** Region pop growth modifiers slowly fades away over time, becoming 4% weaker each year until they are completely removed after 25 years.
			* [[Aliens#Alien Xenoforming\|Xenoflora]] decreases pop growth by -1% per 200 levels of xenoflora growth.
			** For reference, whenever xenoflora growth exceeds 100 levels, 50 levels are spent to spawn a [[Aliens#Megafauna\|megafauna]], so this will rarely exceed an impact of -0.5% growth rate.
			* Nuclear fallout decreases pop growth by 4% per layer of nuclear fallout. These can be removed through massive investments into the {{TV\|environment}}.

			The above effects are summed up and then capped between -10% and +10% annual pop growth.

			Then the effects of severe [[Climate Change]] are applied:
			* For every degree of temperature anomaly above or below 8 degrees, population growth decreases by 1%.
			* This effect is doubled for {{icon\|ecologically vulnerable region\|bgcolor=DarkSlateGray}}ecologically vulnerable regions.
			* This effect is halved for {{icon\|ecologically protected region}}ecologically protected regions.

			At the start of every month, the population of every region is changed to match its projected annual pop growth rate. But a small amount of randomization between -0.0412% and +0.0412% is also added to this monthly pop change.

			If the region population decreases, the nation's {{TV\|education}} does too. If you lose more than 0.5 million population in a single month (no, it does not scale with total pop), you get the maximum reduction of -0.005 {{TV\|education}}. This can add up quickly in a large nation with many regions, each reducing the {{TV\|education}} by a maximum of -0.005 every month.

			Note: This {{TV\|education}} decrease is only applied by the automatic monthly pop change. Loss of pop from other sources such as [[Terrestrial_Warfare\|war]] or [[Events\|natural disasters]] has no effect on {{TV\|education}}.