I would have thought thinking evolved

King Arthur

From:http://philosophy.uwaterloo.ca/MindD...cedualism.html

Quote
Perhaps the most famous proponent of substance dualism was Descartes, who cashed out the distinction between minds and bodies as follows: minds are things that think but lack spatial magnitude, and bodies are things that have spatial magnitudes, but don't think.
End Quote

I would have thought thinking evolved. Just thinking here, was consciousness non existant in our evolutionary ancestors making thought no more spectacular than, for example, the human hand or eye?