Adult Learning Theory

Though written around 1513, more than 500 years ago, Italian diplomat Niccolò Machiavelli's The Prince is still both widely listened to and very influential. Listeners turn to it for its direct advice on the question of how to attain - and retain - power. Machiavelli's answer, in brief: Use any means necessary to make sure the state survives.

What really happened when the world's two greatest superpowers went head to head during the Cold War? We Now Know is a major reappraisal of the struggle for political and ideological supremacy between the United States and the Soviet Union from 1945 to the Cuban Missile Crisis of 1962.

US psychologist Abraham Maslow's 1943 essay "A Theory of Human Motivation" established his idea of humanistic psychology as a "third force" in the field. He outlined a new approach to understanding the mind, saying humans are motivated by their need to satisfy a series of hierarchical needs, starting with the most essential first. He thought it important for the advancement of psychology to identify, group, and rank them in terms of priority.

Michael R. Gottfredson and Travis Hirschi's 1990 work, A General Theory of Crime, assessed contemporary work in criminology, while also introducing a new, comprehensive theory of crime. At the time, researchers tended to focus on environmental factors that led to crime, not on the criminals themselves. Additionally, crime researchers came from different disciplines and inclined towards thinking about crime only from their particular perspective. This meant ideas about what caused crime, and how to prevent it, were often in conflict.