Lecture by Marc Castellnou (15/05/2014) in THESys Lecture series of Humboldt-Universität zu Berlin. Wildfires are one of the most commented and visible disturbances in our forests; wildfire risk management is a hot topic in climate change agendas. While wildfires represent an important ecological process, they also significantly impair the function of forests as a buffer to climate change. How can we manage wildfires? Why do we fight them so aggressively? Why do our forests burn?