You have countries like India that have tried to help untouchables, with essentially affirmative-action programs, but it hasn't fundamentally changed the structure of their societies.

It was basic research in the photoelectric field-in the photoelectric effect that would one day lead to solar panels. It was basic research in physics that would eventually produce the CAT scan. The calculations of today's GPS satellites are based on the equations that Einstein put to paper more than a century ago.

Nobody's changing what you've got. You get to keep it.

What is certainly true is that the American people, just like the German people, just like the British and people around the world, are seeing extraordinarily rapid change. The world is shrinking, the economies have become much more integrated and demographics are shifting.

I think that our politics everywhere are gonna be going through this bumpy phase. But as long as we stay true to our Democratic principles, as long as elections have integrity, as long as we respect freedom of speech, freedom of religion, as long as there are checks and balances in our governments so that the people have the ability to not just make judgments about how well government is serving them but also change governments if they're not serving them well, then I have confidence that over the long term, progress will continue.

If you're a strong man, you should not feel threatened by strong women.

I believe that the best measure of whether a nation is going to be successful is whether they are tapping the talents of their women.