It’s now obvious, in retrospect that an era turned on November 14, 2007, when Barack Obama spoke at Google.
The event was symbolic of a larger change going on in the economy, and thus in politics. Oil would be replaced by technology. Power, and responsibility, would move from Houston to Silicon Valley. The Kochs would fall, the Google guys would rise.
Of course, Silicon Valley hasn’t always been a liberal bastion. The original leaders of Silicon Valley were Republican. David Packard was an assistant secretary of defense under Nixon, during Vietnam. The Valley was always more about Apollo 13 than Woodstock. The Internet was a Cold War activity.