Horst Rittel and Melvin Webber introduced the term "wicked problems" in their 1973 seminal paper. The paper describes 10 criteria for what counts as a "wicked problem." In short, "wicked problems" are uncertain, disputed situations that can only be engaged with the difficult process of stakeholder collaboration and consensus building. This describes many issues surrounding sustainability. Below are video resources SMEP has generated about defining and addressing these wicked problems. For further information, explore the other media resources on this website or subscribe to our YouTube channel.