Human Factors 1.0 studied how humans interact with machines and technology, bringing engineering and psychology into contact in the 1950s and giving rise to theories of user-centric design. This course will cover recent theoretical advances in cognitive and social psychology, especially in human judgment and decision making, that are relevant for engineers and choice architects as they address technical and societal challenges related to sustainability. Such psychological theory (human factors 2.0) can be creatively applied to designs decision environments that help people overcome present bias, loss aversion, and status-quo bias.