Douglas M. Jesseph on Thomas Hobbes

“The irony here is quite remarkable: Hobbes, who would later spend years publishing and defending numerous attempts to square the circle, published his first mathematical work as part of a campaign to silence an old circle squarer. Indeed, less than a decade after his participation in Pell's battle with Longomontanus, Hobbes would find himself involved in a prolonged and bitter controversy that centered on his claims to have squared the circle, and he would go to his grave insisting that he had solved this ancient geometrical problem.”

“It was supposedly the discovery of mathematics at the age of forty that led Hobbes to attempt to cast all of philosophy on the model of geometry.”