This straightforward mod makes all leaders (except Montezuma) adapt the expanionist tendencies of Trajan. Unlike Trajan, they will not get angry or yell at you if you have fewer cities than they do.
Montezuma is NOT affected by this mod. I left him out because including him could crash the game for anyone who doesn't have him as DLC yet.
I am unsure whether this mod conflicts with other AI mods. It probably does not, but it would clash with anything that adds the Expansionist trait to leaders on the LeaderTraits table.
Quo's Everyone's Expansionist 2016-11-19
Simple mod that gives Trajan's Expanionist tendencies to all leaders