Wilhelm Hasenclever was a German politician. He was originally a tanner by trade but later became a journalist and author. However, he is most known for his political work in the predecessors of the Social Democratic Party of Germany (SPD).
Wilhelm Heitmeyer is sociologist and professor of education specializing in socialisation. From 1996 to 2013 he headed the Institute for Interdisciplinary Research on Conflict and Violence (IKG) at Bielefeld University. Since retiring as director, he has held the position of Senior Research Professor at IKG.