That's technically us. [The Gods thing, you know.] It can be complicated to explain, and I don't know how much you really want to get into the dynamics of alternate universes and simply different ones. To go from an example I've already partially explained, the Condesce was an external influence. An Earth without her wouldn't have turned out the same way, and we know that because we were able to see that version of Earth.

From what I understand, the same thing happened with the troll species. You can tell that something interfered by looking at trolls who didn't experience this interference and comparing them to the ones that did. Based on the haphazard and long-winded explanations of a dead troll, I believe that the influence was at the behest of a demonic entity known as Lord English that seeks to destroy every universe he enters.

[The order of meteor appearance also mattered but he's trying not to kill Jay with Homestuck here.]