What problems have you seen solved in your lifetime? And I'm not talking about equations. The things that come immediately to my mind are medical advances/immunizations. But I'm wondering more about issues of the heart and mind. Do you think the world is getting better in terms of humanization? (And I'm not asking about whether you love or hate Bush, or the 'war on terror,' or something like that). I mean even locally in your community, as well as across the planet. And where do you think the best investments of time, energy and money are being spent? What's working to make things better?