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
How would it help conversations about the role of nature & nurture in our psychology & behaviour?
Nature v. nurture is interesting, but it doesn't by itself explain the full range of human behaviour, or diffs between people.
A good part of the difference between people is due to the knowledge stored in their heads, and in their societies.
And that comes from culture.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.