Insisting that we must tax and take and demonize those who have already achieved the American Dream. That may turn out to be a good re-election strategy for President Obama, but is a demoralizing message for America.

I think Gingrich has embarrassed the party over time. Whether he'll do it again in the future, I don't know. But Gov. Romney never has.

And on this you have my pledge - unlike in the past, when you stood up and did what was right, this governor will not pull the rug out from underneath you - I will sign strong reform bills.

Now, do I think there has to be shared sacrifice among other nations in the world who want a stable and secure world? Absolutely, there has to be. But I don't think that America can ever abdicate its leadership role in the world because of who we are and where we've come from. We are the symbol for the world for freedom and liberty.

Rather than engineering our economies solely to maximise GDP, Africa's business and political leaders must build economies explicitly designed to end poverty and inequality.

The exposed nature of life in the public square affects leaders' attitudes toward risk - and failure.

I think having a visionary CEO is awesome, and visionary leadership is one thing, but you also need checks and balances on whether this company can withstand a very honest and critical look at itself.

Leadership is an opportunity to serve. It is not a trumpet call to self-importance.