Influence

Influence is a FIDSI resource used to perform diplomatic actions and implement empire plan policies.

A few factions have unique interactions with Influence:
 * The Drakken get +3  on terrain with Ruins due to their "Endless Excavation" trait.
 * The Cultists can use Influence to convert minor faction villages due to their "Conversion" trait.
 * The Morgawr can use Influence to take control of roaming armies due to their "Catspaw" trait and un-pacify pacified villages due to their "Seeds of Dissent" trait.

City Improvements
This list includes any City Improvement that increases a city's Influence output, even indirectly. Some of the improvements listed have additional effects that do not affect Influence production, but for simplicity those effects are not listed.

Expansions
Again, while many of these expansions have other effects, only those affecting Influence production have been listed.

Heroes
Heroes provide a number of ways to increase the Influence output of a city they are the governor of, whether that be through capacities, skills, or accessories.

Accessories
All listed accessories are Tomes.

Arcana
The Ardent Mages are able to research the Arcana of Authority technology, which unlocks the Pillar of Influence for placement. This pillar increase the Influence output of tiles within range depending on the Arcana level as shown here: Upon obtaining the Cold Engineering technology by completing Chapter 5, Part 1 of the Ardent Mages faction quest, the Pillar of Influence will produce an additional +1 on tiles within its range during winter.

Assimilation
The Kazanji provide an assimilation bonus of +5% on cities per pacified and rebuilt village, up to +30%.

Fortresses
The three types of Citadels that make the center of Fortresses and every Facility provides a bonus of +1. The only exception to this is the Center of Influence Facility, which provides a bonus of +10, and a bonus of +2% per Fortress you control on Empire, while giving every other empire -2%  per Fortress you control.

Resource Boosters
The only Luxury Resource that provides a bonus to Influence is Dye, which provides +50%  on cities when activated as a booster.

Technology
The only technology available to every faction that increases Influence directly without needing to build a city improvement or expansion is the United Empires Council, which provides a bonus of +100% on Cities. There are, however a number of faction-specific technologies that provide a bonus to Influence:
 * The Wild Walkers technology Visions of Glory grants 4  whenever a City Improvement, District, or Region Improvement is built.
 * The Drakken technology Aura of Leadership grants +3  per non-converted village on Cities.
 * The Allayi technology Pilgrims of the End grants 3  per collected Pearl cluster on Empire.
 * The Morgawr technology Breaching Wave grants +1  on Citadels and revealed Facilities.
 * The Kapaku technology Inner Peace grants +15  on terrain with Ruins.

Quests
Some quests give lump sums of Influence as a reward for completing them.