Ayn Rand's The Difference Between Us

In “The Difference Between Us” the program begins by discussing how for several hundreds of years, we’ve classified people into separate “races” by external differences; e.g. eye shape, hair texture, the color of skin, etc., not because we found biological reasons but purely because we look different so therefore we must be genetically different. Science has measured, poked and prodded man in the search for anything that will, conclusively, prove we are different, but nothing has been found. Because the modern human race has only been around for about 100,000 years, not long enough to develop the genetic differences necessary to create different subspecies, and some experts believe that all of the human race can trace their beginnings back