To me, it's about always trying to make decisions that reflect my leadership and who I am.

Leadership, to me, is about the ability to have people want to hear what you have to say. People want to be around you, people want to believe in what you tell them, and they feel good when they walk away from you about who they are and what they're doing.

Leadership is a position where you want to create the opportunity to inspire people to walk along beside you, not listen to what you say.

Mess up and draft somebody at my position, because you are going to sit around and watch him sit the bench. That's always been my mentality. I see it as a challenge.

As an indigenous leader from Bolivia, I know what exclusion looks like. Before 1952, my people were not allowed to even enter the main squares of Bolivia's cities, and there were almost no indigenous politicians in government until the late 1990s.

Never take your eye off the ball. Always remember that you and everyone on the team is the servant of the cause - in our case, girls' education and young women's leadership in Africa.

The American president isn't just the American president. He's going to be the leader of the whole Western world, you know? You got a pretty big responsibility.

I think if you look at Merck's history, I think Merck has a reputation for having been a reasonable company when it comes to pricing, sort of a leader in that respect.