We have seen violence and terror perpetrated by those who profess to stand up for faith, their faith. Professed to stand up for Islam, but in fact are betraying it. Humanity has been grappling with these questions throughout human history. And lest we get on our high horse and think this is unique to some other place, remember that during the Crusades and the Inquisition people committed terrible deeds in the name of Christ.

No challenge poses a greater threat to future generations than climate change.

If you look at countries like South Africa, where you had a black majority, there have been efforts to tax and help that black majority, but it hasn't come in the form of a formal reparations program.

Whether we like it or not, we remain a dominant military superpower.

There are problems that just end up being really hard and by definition the only problems that come to my desk are the ones that nobody else can solve.

History doesn't always move in a straight line. Sometimes it zigs and zags.

A nation that can't control its energy sources can't control its future.