“Inequality undermines the strength of our economy and contributes to economic instability,” says Stiglitz. America’s growth was strongest in periods where inequality was far lower, he points out, particularly in the decades after World War II when wages for middle class and blue collar workers steadily increased. His interests are reflected in his position leading Columbia’s Committee on Global Thought, which was founded in 2005 by President Lee C. I spent some quality time in dive bars, bike shops, and…