How works leaders

[IRussian 48]

 

Can someone explain to me exactly how the leaders are doing? 

[CassalettIV 223]

Well if I understood your question correctly, leaders give bonuses to your civilization: population and economy growth, defense and attack bonuses, and movement point bonus. These values can be positive or negative. Most leaders have a basic "population and economy growth +1%" stat but important leaders like Napoleon Bonaparte have many benefits like attack and MP. You can use the leaders editor to give or modify stats to give your own leaders an "agenda" or reflect real life ones.