The Times They Are A Changin': The Effect of Institutional Change on Cooperative Behaviour at 26,000ft over Sixty Years 1st ed. 2015 edition

This narrative and empirical analysis investigates Hilary's claim that in his day they would not have left a man behind to die. The authors examine over 60 years of Himalayan climbing data and stories in order to test the changes in cooperation in this extreme life and death environment.