Helping people boost themselves out of poverty is the best way to make a lasting positive difference in a person's life.

Trust your gut instinct over spreadsheets. There are too many variables in the real world that you simply can't put into a spreadsheet. Spreadsheets spit out results from your inexact assumptions and give you a false sense of security. In most cases, your heart and gut are still your best guide.

Being a father has been, without a doubt, my greatest source of achievement, pride and inspiration. Fatherhood has taught me about unconditional love, reinforced the importance of giving back and taught me how to be a better person.

The truth is, what Americans enjoy about football is much of what makes the sport dangerous. However, I believe there must be a way to find the art of success and vitality in football, without the driving the level of impact that causes serious risk of head trauma, paralysis and other life-changing injuries.

I've been an entrepreneur all my life, and my recent focus is on finding entrepreneurial solutions to address global challenges in healthcare and education.

I believe we need a more opportunistic and democratic approach to lunar exploration, now that we're shifting from U.S. government-sponsored space exploration to private expeditions.

Philanthropy is not about giving money but about solving problems. While well-meaning, the idea of writing a check and calling it 'philanthropy' is extremely short-sighted and, unfortunately, extremely pervasive.