I always enjoy discussions of history and taxes. How the Mesopotamians or the Romans or people in the 1850’s or in 1913 were taxed, while interesting, is largely not relevant in our 21st-century world, in which technology and society are changing much faster than in the past. History can help us learn from mistakes. We can also learn from contemporary resources: the Department of Commerce’s website, where, under the Bureau of Economic Analysis (BEA), we can find top marginal tax rates and gross domestic product (GDP) growth for corresponding tax years.