by other fundraising things. i think that many of the billionaires out there will immediately sign up for the pledge they d like to have and there will be others okay come along more slowly and reluctantly. all the principles, the gates and warren think it will take a while. so far, a handful of bill heirs have promised to give but there s no legal obligation to do so and now there s an official website, givingpledge.org. that site announces the pledge to the world. so go check it out. would you do this? give away half of your money? half of your fortune? peter singer said, you should. he s a bioethic s professor at princeton and he joins me via skype. when you heard of this, what was your reaction? i was delighted. i mean, this is the kind of thing i ve been pushing for some years in my book the life you