In another thread, someone posted a few hidden agendas, apparently found during gameplays. Notice that the top one there is strictly focused on the late game, the modern era. So, my question is this: Is it possible that hidden agendas will change over the course of a game? That leaders might start out with one hidden agenda in the early game, then switch to another one later on? It seems like this would makes sense, historically, and it would add a little more variety and intrigue to the game.