The best philanthropy is not just about giving money but giving leadership. The best philanthropists bring the gifts that made them successful-the drive, the determination, the refusal to accept that something can't be done if it needs to be into their philanthropy.

Enough of talking: It is time now to do.

One thing, change, is what everyone says. The question is, what type of change? What's the right change to produce a different outcome for the people left behind by globalization?

Examine the legacy that we inherited and what we did. We had boom-and-bust economics and a doubled national debt.

There are millions of young children being educated to a very narrow-minded view of religion. And it's out of that education of large numbers of young people that you then get this extremism.

Repressive states are developing weapons that could cause destruction on a massive scale.

For me, 9/11 was a game changer. It altered my perception of the security threat we faced. I took the position that Britain should be shoulder to shoulder with the U.S. It was a big decision; I didn't take it lightly, or in ignorance of its consequences. It's a big commitment for a country to give, but I believed it was the right thing to do.