Robert Heinlein was interesting, he was in the Navy, Annapolis Grad, till a medical issue forced him out. He was also a very Leftist person supporting Upton Sinclair for governor in California back in the 1930’s.
He ended up marrying a women that was very Conservative and changed his political ideology. He was way ahead of his time in predicting how society would turn out.
Another person was Philip Wylie, he wrote “Nest of Vipers” in 1942 and that book could have be written today with his commentaries on society.
I reread “Friday” recently. He was spot-on for predicting some of the sexual insanity in California like open gender-benders and gender-neutral bathrooms.
Book Review: ‘Friday’ by Robert Heinlein
https://hubpages.com/literature/Book-Review-Friday-by-Robert-Heinlein