. And the slogan: "All evils are due to lack of knowledge".
You should read his book, The Beginning of Infinity. It's not a slogan but a philosophical position which he explains at length. Learn why he thinks it. He's not an idiot.
Since you partly agree with him, and have mixed feelings, I think it'd be worth looking into for you, so I wanted to let you know it's much more than a slogan! And "optimism" to DD does not mean "predicting a positive future", it's not about wearing rose colored glasses.
http://vimeo.com/22099396
What do people think of this, from a Bayesian perspective?
It is a talk given to the Oxford Transhumanists. Their previous speaker was Eliezer Yudkowsky. Audio version and past talks here: http://groupspaces.com/oxfordtranshumanists/pages/past-talks