(although Neil deGrasse Tyson comes close, IMO).
Yeah he has inherited the title of chief science communicator :)
Why is only Carl Sagan singled out? Why does no one touch Abraham Linclon, Shakespeare, Will Durant?
I'll touch Will Durant. You didn't half quote him but generally I disagree with his prediction of secularism causing society's downfall. He looks to Greece and Rome but he ignores the fact that those cultures did not replace religion with secularism, but mainly replaced religion with hedonism. On the other hand Durants fear is actually a good cautionary phobia which modern society should still take note of.