I have bemoaned in the past the celebrity culture in which we grant more weight to the opinions of celebrities than they deserve. It seems to be part of human nature to idolize and hero-worship. It can be benign, even healthy. Young athletes idolizing the talent and hard work of sports stars may be spurred on to greater achievement themselves. I also think that intellectual heroes, like Carl Sagan and Stephen J. Gould, can have an enormously positive influence on culture and society.