Twitter Was Born 5 Years Ago Today, @Jack Tweets the Story: It was a year later that I joined Twitter, personally. It was still small but very hyped up among San Francisco tech lovers. I thought it sounded like a waste of time, but signed up to try and catch some news at South by Southwest. Four years later, Twitter has changed my life dramatically. Thanks Jack and team for taking that leap. I look forward to reading Jack's tweets about Twitter history over the next few weeks.