Having grown up in a very traditional lower middle class household, the counterculture of the 1960s was alien to me at first. One of the earliest of the underground artists whose work "spoke" to me was Victor Moscoso, whose birthday is apparently today! Happy birthday, sir! I later found out he did many of the colorful posters we know associate with the sixties and, in fact, I spent many an hour trying to do that great lettering. I see where he now has a font named after him. See below.