Closing comment: The ever increasing importance of applied social psychology
This special issue commemorates and celebrates the incredible contributions of Siegfried Streufert to the field of Applied Social Psychology (amongst many others). As the proceeding articles eloquently demonstrate, these contributions have had and continued to have, a profound influence on the field. His work on Behavioural Complexity, in particular, has had a tangible impact on our under- standing of how decisions are (optimally) made in health, organizational, and other settings. Of course, 50 years ago Siegfried also founded the Journal of Applied Social Psychology and in so doing created a unique, powerful, and inspiring conduit for communication between scientists and practitioners seeking to solve social problems.