Civilization IV/Diplomacy

Diplomacy is the means by which the player in Civ IV can interact with other factions, negotiate trade agreements, trade technology, build alliances and gain support for a war. The mechanics are similar to those used in Civ III: things you can trade are displayed on the right of the screen, and items you may ask for in return lie on the left.

Any on-going deal may be canceled after 10 turns without a declaration of war. An on-going item, such as money per turn, may not be traded for an immediate item, such as a city.

Trading
This is the list of things, to my knowledge, one can trade in a diplomacy screen. During War, a cease fire or peace treaty may be offered.

Potential Trade Items

 * 1) Gold, lump sum.
 * 2) Gold per turn
 * 3) World map
 * 4) Open Borders Agreement
 * 5) Defense Pact
 * 6) Permanent alliance
 * 7) Technology
 * 8) Resources
 * 9) Cities
 * 10) 'Make peace with'
 * 11) 'Declare War on'
 * 12) 'Stop Trading With'
 * 13) Adopt (civics)
 * 14) Convert (religion)

Gold
Requires: Currency This can either be in the form of a one off payment, or a series of payments. The lump sum offered or demanded cannot exceed the total available to that civilization at that time. This prevents you from actually bankrupting anyone. Likewise, Gold Per Turn cannot exceed the faction’s current net gain per turn.

World Map
Requires: Paper

Modifiers
These are very important. Your interactions with other civilizations, as well as your civics, juxtaposition and religion can affect their opinion of you. This is measured with modifiers. Positive modifiers make them like you more, negative ones make them dislike you.