Alan David Sokal is a professor of mathematics at University College London and professor of physics at New York University. He works in statistical mechanics and combinatorics. He is best known to the wider public for his criticism of postmodernism, after the Sokal affair in 1996 when his deliberately nonsensical paper was published by Duke University's Social Text. He also works to counter faulty scientific reasoning, as seen with his involvement in criticising the critical positivity ratio concept in positive psychology. 

January 24th, 1955 in Boston (Age 69)