1. Fund the top half of The Copenhagen Consensus projects. 2. Longevity research: Give a billion to Aubrey de Grey. 3. Push the US government towards more support of liberty. Money on that scale could make a significant start to unwinding the welfare state. a. The Institute for Justice has a very good program making practical steps. They could productively spend at least 10 times their current budget. Think about whether their methods can be applied in other areas. b. Try to convince Marshall Fritz to return to the Advocates for Self Government. He pioneered a process of inventing tools to spread liberty, and then measure the results to decide how to spend more money. c. Start think tanks to flood the political market with arguments and (funded) proposals for moving toward liberty. The Cato Institute does a good job, but in this case, I'd expect to improve things more by providing them with competition than with funding. 4. Buy OLPCs for the kids in all the "bottom billion" countries.