Immanuel Wallerstein, one of the world’s greatest social scientists, has died.

"He was important to me, as a friend and as a source of inspiration. He helped us understand the world system and was a passionate participant in many struggles."

Wallerstein wrote the preface for The Road Map to Negotiations by Abdullah Öcalan. This was the centerpiece of the secret dialogue process between Abdullah Öcalan and the Turkish state that started in 2009 and was broken off in mid-2011.