Immanuel Wallerstein

Immanuel Maurice Wallerstein (; September 28, 1930 – August 31, 2019) was an American sociologist, economic historian and world-systems analyst. His best known works helped developed the world-systems approach. He published bimonthly commentaries through Agence Global on world affairs from October 1998 to July 2019. 
He was a Senior Research Scholar at Yale University from 2000 until his death in 2019.