Best-selling author Malcolm Gladwell discusses America's dramatically changing notions of wealth and income inequality since the mid-twentieth century. Gladwell notes that during the 1950s, American tax rates were 91 percent on incomes over $200,000. "What's amazing is that, if you even bring this up now, people don't believe you," he says.

Best-selling author Malcolm Gladwell discusses America's dramatically changing notions of wealth and income inequality since the mid-twentieth century. Gladwell notes that during the 1950s, American tax rates were 91 percent on incomes over $200,000. "What's amazing is that, if you even bring this up now, people don't believe you," he says.