What exactly is key work key to?

The Failures of Behavioural Psychology

I have written a bit about behaviourism and its influence. More than once I have made reference to Arthur Koestler’s critique of behaviourism from his 1960’s book, The Ghost in the Machine. He begins it by arguing that behaviourism ‘has permeated our attitudes to philosophy, social science , education, psychiatry.’ The more I have thought about it since I first read that immensely useful book, the more I have thought he is right.