William James, founding father of modern psychology is often known by photos of him in his later years. But, here we see him in his early twenties on a trip to Brazil and looking f.i.n.e.
See the full photo on Wikimedia Commons: William James in Brazil, 1865
h/t @GregoryHickok on twitter
Mind Hacks 
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Very cool dude,and excellent writer.
More true than ever: “American society is defined by two sets of James brothers: William & Henry at one end and Frank & Jesse at the other….”