The last time New York was governed by a Democratic mayor, it was a very different place. When David Dinkins took office in 1990 maybe 1,000 New Yorkers had an email address, people who rode bikes were considered weird even by progressives, racial tension was at the center of city politics and climate change was known as global warming and was not an issue anybody but a few scientists and environmentalist discussed. Most significantly, the people in the city were very different, age replacement, immigration and other population movements have changed the city a great deal. Joe Lhota learned this the hard way as he and former mayor Rudy Giuliani sought to scare people by painting a fear mongering and inaccurate picture of Dinkins, a mayor who many New Yorkers don't remember at all.