I'm Giving Away Money!

I recently posted about a writing wager I have developed for myself and a group of friends. The wager is simple: everyone chooses a charity and writes a novel. Finish the novel: donate to your charity. Give up or go a month without progress: donate to another charity (we have yet to decide whether it should be one charity or all three other charities).

I plan to choose an effective charity, however I am still in the decision process. So, here's you're chance to influence who gets money: tell me who I should donate to.

I'd like to hear any suggestions for the most effective charity you know. Support your choice as much or as little as you wish, I'll still be making the final decision. Interpret the word "effective" as you wish. The point is, tell me who you think I should give money to.