 Evolutionary biologists such as Jones have argued that genes that did not lead to selfish behaviour would die out compared to genes that did, because the selfish genes would favour themselves.However, the mathematician George Constable and colleagues have argued that altruism can be an evolutionarily stable strategy, making organisms better able to survive random catastrophes.The belief in biological determinism was matched in the 20th century by a blank slate denial of any possible influence of genes on human behavior, leading to a long and heated debate about "nature and nurture".