For thousands of years, people gathered in the Market Square to exchange goods and socialize. We shared stories and ideas about our lives and the world around us. Then for a relatively short time, we spent all our time in separate houses with only the radio, tv and mall to connect us to the outside world. This isolation instilled in us an expectation of privacy. After this brief hermitage, we have now returned to the Market Square to exchange goods and to socialize. The new Market Square of social media is no less secure or private than the old one was. But without it, we lose some of our humanity. Isolation is unnatural for social creatures, but humans have the ability to practice discretion and choose what we share.