1. Mm! Never gave Borlaug any thought. I'd put him somewhere in Mexico, breeding a better strain of wheat. It might never occur to the people of the world to go international with it, since it's a nastier, colder sort of place.
2. Environmental damage - well there's more in the ground, I guess, but things still aren't great. The world's economic development was notably slowed.
3. Tech levels are notably behind ours - I would guess it would feel like the early 90s if you looked at it now.
Buchanan and Feingold wound up in the same party in the political realignment post-Haig, yeah. Both were (as far as my political understanding of the day when I wrote FAT) radical outsiders on the edge of contemporary politics. By 'now' they've probably had a falling-out.
I have nothing but praise for the maps; while I might not agree with all the borders, somebody worked hard doing art and I am not one to gainsay them.
1. Enoch Powell is mentioned as Prime Minister - look I'll be honest with you, when I wrote the thing I was a college undergraduate and didn't always do a lot of research. The Ulster connection makes a lot of sense, though.
2. Were there a lot of rumblings about an African man - you bet! Bokassa had ways of dealing with his critics, though.
3. What happened to Eisenhower - just a minor staff officer in the ATL who then retired. The 'force' just wasn't with him.
4. How did Chikatilo - I don't recall! I'd have to go back and look.
5. Whatever happened to the Collective Security Organization - hard to turn them off once they were established (collective security agencies are super-useful), but they've probably had periods where they didn't matter at all.
5. What motivated you to write For All Time? - originally it was just to replace a good President with a bad one, then it was the result of an effort to see how plausibly bad I could make the 20th century. That's why there was no WWIII, despite the occasional small nuclear war - just a nuclear war would be too easy!
6. Was it tough to research? - yes it was! This is why I tell my students that they don't know how lucky they have it now.