Disinclination

Human beings, who are almost unique in having the ability to learn from the experience of others, are also remarkable for their apparent disinclination to do so. 

-- Douglas Adams (1952 - 2001), English author and satirist, most famous for his The Hitchhiker's Guide to the Galaxy series of radio plays and books, Last Chance to See, Chapter 4: Heartbeats in the Night, p. 116