A sustainable world means working together to create prosperity for all.

I wrote 'The Blue Sweater' to inspire more people to become engaged in working to solve the problems of global poverty.

Our actions - and inaction - touch people every day, people we may never know and never meet.

On the one hand, I loved being a banker. I loved how numbers could tell a story and how you can invest in ideas and see them translate into products and services and create jobs. What I didn't like, particularly where I was working in Brazil during the debt crisis of the early '80s, was how the poor were excluded from the banking system. I made the decision to try and experiment with whether we could use the tools of banking to extend the benefits of the economy to the poor.

By going from the bottom-up again, we see where successes work, and you can also see where the status quo can be the biggest obstacle or roadblock to success. The kind of entrepreneurs in whom we need to invest are the kind who are willing to fight that status quo, bureaucracy, complacency, and corruption.

I think I still have a great sense of adventure and trust, and am surprisingly idealistic given all the horrible things I've seen since I was 25. I think how I have changed is that I have a much deeper understanding of the dark forces in the world, of power.

My dream is to find individuals who take financial resources and convert them into changing the world in the most positive ways.