The same thing happened to me today - within 12 hours I got at least +1 karma on every single post of mine from the last month and a half or so, which happened to be primarily on the history of life / 'great filter' threads.
I don't think it's ideological. Mysterious mass-upvoter?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one.
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.