Edit: If you want to see the newest version open the spoiler below. Spoiler : START ORIGINAL POST: I noticed during a Culture game that I was still unsure about some of the finer points of distinction between Commerce, Gold and Wealth. In terms of which sources were modified by which civics and buildings I just couldn't say. So I decided to make it visual and try to learn it that way. I put together this diagram and am hoping that some of you who know this stuff can comment on whether or not I got it right. All corrections and suggestions are welcome. Still working on the colors and typography.