Q: In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.
Immanuel Maurice Wallerstein ( ; September 28 , 1930 – August 31 , 2019 ) was an American sociologist , economic historian and world-systems analyst .
A:
Immanuel Maurice Wallerstein ( ; September 28 , 1930 – August 31 , 2019 ) was an American sociologist , economic historian and world-systems analyst , arguably best known for his development of the general approach in sociology which led to the emergence of his world-systems approach .