Some links to Grothendieck.

A recent article Who is Alexander Grothendieck? by Winfried Scharlau fills in the work of Grothendieck in poltics, religion and mysticism since the 70's. There is a spate of articles about Grothendieck since he turned 80 this year.
From the very readable 2004 articles by Allyn Jackson"Comme Appelé du Néant: As If Summoned from the Void: The Life of Alexandre Grothendieck":
"The work of Alexandre Grothendieck has had a profound impact on modern mathematics and, more broadly, ranks among the most important advances in human knowledge during the twentieth century. The stature of Grothendieck can be compared to that of, for example, Albert Einstein. Each of them opened revolutionary new perspectives that transformed the terrain of exploration, and each sought fundamental, unifying connections among phenomena.”