Today’s most pressing challenges require behaviour change at many levels, from the city to the individual. This book focuses on the collective influences that can be seen to shape change.

Timothy Williamson explains clearly and concisely how contemporary philosophers think and work, and reflects on their powers and limitations.

What does 'if' mean? Timothy Williamson presents a controversial new approach to understanding conditional thinking, which is central to human cognitive life.

What kind of knowledge can we get just by thinking?