We are more prone to generalize the bad than the good. We assume that the bad is more potent and contagious.
Eric Hoffer (July 25, 1902 May 21, 1983) was an American social writer. He produced ten books and won the Presidential Medal of Freedom in February 1983 from Ronald Reagan. His first book, The True Believer, published in 1951, was widely recognized as a classic. This book, which he considered his best, established his reputation, and he remained a successful writer for most of his remaining years.