James P. Hogan
Not only did I not know until just now that he passed away a year and a half ago, I also didn’t know he went a little wacky in his later years.
What a pity. I was pretty fond of his earlier stuff - the Giants series was one of my favorites as a kid (I don’t believe in it, but I’m still a sucker for a good Velikovskian yarn), and Voyage From Yesteryear was one of my first real introductions to libertarian ideas, since I didn’t read any Heinlein until I was eighteen. And just this morning I was randomly thinking about the premise of The Genesis Machine.