How can we come to grips with climate change, the excessive consumption of natural resources, a decrease in biodiversity, and soil degradation? At the same time, how can we ensure social justice and a good quality of life all around the world? Only if we understand the complex processes behind the greatest challenges of our time can we develop new forms of environmentally, socially, and economically sustainable lifestyles. Excellent science is making a significant contribution to finding solutions to these problems. The duty of science in this respect reaches far beyond the simple creation of knowledge.