collapse of the old society

Just to pick out one thing, Iraq was very deliberately setup by the Bush Administration. They put specific effort into falsifying evidence to support an invasion. There's no particular reason to believe Iraq would have been invaded by Gore.

A major issue in the run up to 9/11 was a coordination failure due to a delayed Administration transition. It's hard to say for sure, but it's quite possible 9/11 doesn't even happen if it's a direct transition between Clinton and Gore.

Oh, and we'd probably be in the ICC. The treaty was finalized towards the end of Clinton's run, he was in favor of it, but he left it to the next Admin to decide what to do with it. Bush Admin canned it.