One of my heroes is David Pearce. He is off-the-charts on three qualities I greatly admire: he's frighteningly smart, he genuinely wants to make the world a better place, and he thinks big. How big? One of his missions is to eradicate suffering in all sentient life. You can read his manifesto, the Hedonistic Imperative, at the link below. He also provides detailed responses to a variety of objections to the mission, including one that I offered. Before getting started, I recommend finding a comfortable chair in a quiet room and clearing your schedule for five to ten hours. Guaranteed to make you think.
http://www.hedweb.com/hedethic/tabconhi.htm