Jean-Paul Sartre's concern, in a phrase, was what it was like to be human. The topic sounded unmanageable, but Sartre linked its core elements—the mind, human values and human freedom—in big loose equations When Jean-Paul Sartre died, 50,000 people followed his hearse through Paris The philosopher and writer died on April 15th 1980 ECONOMIST.COM ------ Leonardo da Vinci Mathematician Leonardo di ser Piero da Vinci, more commonly Leonardo da Vinci or simply Leonardo, was an Italian polymath whose areas of interest included invention, painting, sculpting, architecture, science, music, ... Wikipedia Born : April 15, 1452, Anchiano Died : May 2, 1519, Clos Lucé, Amboise, France Known for : Art, science Siblings : Bartolomeo da Vinci , Giovanni Ser Piero , more Quotes Simplicity is the ultimate sophistication. As a well-spent day ...