Me and my dad are the biggest promoters of an estate tax in the US. It's not a popular position.

In a system of capitalism, as people's wealth rises, the financial incentive to serve them rises. As their wealth falls, the financial incentive to serve them falls, until it becomes zero. We have to find a way to make the aspects of capitalism that serve wealthier people serve poorer people as well.

I like the idea of putting your Christmas wish list up and letting people share it.

AIDS we're - most of these diseases - we are down from the peak. We're down about 40 per cent from the peak and if we got the right vaccines, which are at the early stage of discovering, then the numbers would come down very dramatically. So that's why we talk about it as an emergency.

Leaders are those who empower others.

I've for some reason or other... never met Donald Trump.

The people who resist change will be confronted by the growing number of people who see that better ways are available; thanks to technology.