We are living in a pretty safe world.
Granted, millions are not dying from world war, but the world is not a pretty safe place unless your cocooned in the lap of American opportunism.
While the principles still apply, one should apply their skills to contribute to the community around them. The reality is that in many parts of the world contributing to your community, can get you killed. Of course revolutions are not started by people who live, even if we are just talking about technological revolutions, but we should be true to the reality of what it takes.