I would, if it wasn't for my mom. She's 66, and she's always the one who I just cannot possibly imagine sacrificing in any thought experiment. My own life, sure, most other people I love only after much thought, only for a really, really good reason, and only with a huge deal of pain on my part, but if I have to decide in the case of mom vs. world, the world might have a problem.

If it weren't for her, I would immediately choose the global option, because I'm pretty sure if politicians' lives would suddenly depend on your average life expectancy, we'd see the end of AIDS, starvation, high child mortality and wars within five years, therefore changing the world for the awesome and raising the average life expectancy back to a comfortable level within my lifetime.