I had previously read Forever War and Forever Peace by Joe Haldeman, and yesterday I read Forever Free. While Forever Peace is not a sequel to Forever War, Forever Free is. If you have not read Forever Free yet, leave now. The book takes a doozy of a left turn, go read the book and come back; it won’t take that long and it is a good read.
So, what did you think happened to those who decided to wait for God on the ship? How would a universe change with a change in the speed of light?