John Griggs Thompson
* October 13, 1932, Ottawa, Kansas, USA
Fields Medal - 1970
For proving, together with Walter Feit, that all non-cyclic finite simple groups have even order. The extension of this work by Thompson determined the minimal simple finite groups, i.e. the simple finite groups whose proper subgroups are solvable.
Abel Prize - 2008
Together with Jacques Tits, for their profound achievements in algebra and in particular for shaping modern group theory.