Faith

**Faith** is one of the primary yields in *Humankind*, likely representing religious influence or pressure. In the game, it allows the Empires to spread their Religions.

## Faith Production

When a Territory currently follows a Religion, the Territory will produce ****Faith**** for this Majority Religion. The **Faith** output is produced from the below sources, and is calculated on a per-Territory basis:

* The initial religion choice (**+6** on Main Plaza if **Polytheism**, or **+2** on Admin Center if **Shamanism**);
* The Holy Sites of a religion (**+20** as base value);
* The tier 2 Tenet of a religion (**+5** on Territories following the Religion);
* Various Wonders and Emblematic Quarters (e.g., wonders that act as a Holy Site, and Faith-yielding Emblematic Quarters such as Great Obelisk and Nemeton);
* Certain Religion Civics (e.g., **Religious Hostility** Civic);
* Territories with the Tradition Ideology (**+4** on Territories following the state religion at maximum).

## Faith and Religion Spread

Every **Religion** can spread across the map and influence other Territories through its ****Faith**** **production**; the spreading is a **passive** process that are not directly controlled by the Empires.

* Both ****Faith**** and Influence spread largely follows the same mechanics.

### Basic Faith Spread Mechanics

The spreading of a Religion is measured in **Territory-based **Faith** production** and can be checked in the **Religion Screen**.

Every Territory will produce a certain value of ****Faith**** for a given Religion, from Holy Sites in this Territory, Emblematic Quarters in this Territory, the " on Territory" bonuses, etc.

* This local value of ****Faith**** is known as **Faith Production**.
* The produced ****Faith**** will then spread to and stack up in distant Territories; and this foreign value of ****Faith**** is known as **Faith Impact** (or **Religion Pressure** among players).
* A Territory can receive **Faith Impacts** from **multiple Territories**, sometimes from a long distance away, albeit with a decrease (more on following sections).

Every Territory will receive  from both **Faith Production** and **Faith Impact**; the sum of both is the **Religion Influence** of a Religion on a given Territory.

Every Religion's Influence on a Territory is calculated as a **percentage** of the total ****Faith**** this Territory received. If a Religion's **Influence** on a given Territory is **20% higher in **Faith**** than the Current Religion's **Influence**, then the Territory and Followers inside it will be gradually convert to the new Religion.

### Distance impacts on Faith Spread

The spread of ****Faith**** across the map decreases with **Territory-based distances**. A Territory would receive stronger Religion Pressure from adjacent Territories, and reduced Pressure from Territories further away. This distance based decrease is calculated as following:

Faith Impact on distant Territory = Local Faith Production \* Territory Distance ^ (-1.25)

"Territory Distance" and also be understand as "Number of Territories the spreading Faith needs to pass through."

This formula means every Territory will always have a 100% Faith pressure on adjacent Territories, and much less than 100% on Territories further away. The minimum Faith Impact is always **+1**Faith****.

### Terrain impacts on Faith Spread

A Territory can only spread ****Faith**** to other Territories **connected by Roads**.

* If two Territories are adjacent to each other, but not connected by Roads - such as they only share a water border, or the access between the two are blocked by mountains or high cliffs - then the Faith spread between these two Territories will be **0**.

For islandic Territories and Territories across the ocean, they will not naturally receive Faith pressure from outside sources beyond the sea. Only by building at least one **Harbor** or **Airport** in these Territories can they receive outside Faith.

### Trade and Diplomacy impacts on Faith Spread

The starting and destination Territories of a Trade Route will receive **less reduction** on Faith Pressure.

This Faith Spread though Trade is a one-way process, and **will only spread the Religion of the Exporting Empire into the Importing Empire**. This means a major Exporting Empire with various Luxuries and Strategics, especially if they built Faith-produce Districts in the Resource-rich Territories, will more likely to spread its Religion to the rest of world.

The rules of Faith Spread via Trade Routes are as of below:

* For a Land Route, the Exporting Territory's Faith Pressure to the Importing Territory **will only receive 50% distance reduction** - in terms of formula, instead of a Distance^(-1.25), it becomes (Distance/2)^(-1.25) - as if **the distance between the two are halved**.
* For a Naval Route connected by two Harbors, the Importing Territory **will receive 100% Faith Pressure** from the Exporting Territory, as if the two are **adjacent**.
* For an Air Route connected by two Airports, the Importing Territory **will receive 100% Faith Pressure** from the Exporting Territory, as if the two are **adjacent**.
* For Naval Routes, if one end of the naval Trade Route **doesn't have a Harbor** - only has a Trade Port instead - then the "unconnected" rule will apply, and Faith will not spread between these two Territories.
* Only the starting and the destination Territories will have their Religion be impacted by Trade Routes. Territories that the Trade Route passing by along the way will not receive anything extra.

If two Empires are at War, then Faith/Religion will not spread between the two. However, if one Empire captures another Empire's city, the occupying Empire can spread its Religion to the conquered city rather easily, as the other Empire cannot spread its Religion to this city anymore.