One quibble: you don't seem notice the biggest effect, over centuries, is cognitive. Clannishness is selected out, genetically.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
One quibble: you don't seem notice the biggest effect, over centuries, is cognitive. Clannishness is selected out, genetically.