This quick TED talk entry is courtesy of TED.com. If you’re lucky enough to live without want, it’s a natural impulse to be altruistic to others. But, asks philosopher Peter Singer, what’s the most effective way to give? He talks through some surprising thought experiments to help you balance emotion and practicality — and make the biggest impact with whatever you can share. NOTE: Starting at 0:30, this talk contains 30 seconds of graphic footage.