Espionage

[Jheronimus]

According to the basic strategy guide you are able, from the very start of the game, convert commerce into espionage. In what way?

 

[Todd Hawks]

Build a city and meet someone you can actually spy on and then click in the top left corner (just like for research <-> gold)

 

[Polobo]

This assumes you are playing the BtS (Beyond the Sword) expansion, vanilla and warlords don't no include this aspect.

 

[Jheronimus]

ow sorry, there's a espionage slider ofcourse, I'm sorry dumb question

 

[Thray]

Not dumb, it doesn't appear until you meet other civs.