"Andrei Linde had some ideas, Alan Guth had some ideas, Alex Vilenkin had some ideas. I thought I was coming in with this radically new idea that we shouldn't think of the universe as existing on this global scale that no one observer can actually see, that it's actually important to think about what can happen in the causally connected region to one observer, what can you do in any experiment that doesn't actually conflict with the laws of physics, and require superluminal propagation, that we have to ask questions in a way that conform to the laws of physics if we want to get sensible answers."
"Up until 10,000 years ago there were no permanent settlements and all human groups lived by hunting and gathering. Then agriculture was discovered and everything changed. Now a small number of people could supply food for the rest and the first cities arose. Every since that time there has been a steady movement of people out of our original arcadia and into cities, such that now over half the world lives in them. But why given that cities have historically been targets of attack and places of crime and where diseases fester and spread? The answer is that cities have acted as gardens of our prosperity, creativity and innovations and their continued existence is vital to fitting the projected 9 billion people onto this planet. Surprisingly, they are the new 'green centres' of the world."
"I'm thinking a lot about species concepts as applied to humans, about the "Out of Africa" model, and also looking back into Africa itself. I think the idea that modern humans originated in Africa is still a sound concept. Behaviorally and physically, we began our story there, but I've come around to thinking that it wasn't a simple origin. Twenty years ago, I would have argued that our species evolved in one place, maybe in East Africa or South Africa. There was a period of time in just one place where a small population of humans became modern, physically and behaviourally. Isolated and perhaps stressed by climate change, this drove a rapid and punctuational origin for our species. Now I don’t think it was that simple, either within or outside of Africa. "
"My topic is the shift from 'architect' to 'gardener', where 'architect' stands for 'someone who carries a full picture of the work before it is made', to 'gardener' standing for 'someone who plants seeds and waits to see exactly what will come up'. I will argue that today's composer are more frequently 'gardeners' than 'architects' and, further, that the 'composer as architect' metaphor was a transitory historical blip."
"Cooking also obeys the laws of physics, in particular chemistry. Yet it is quite possible to cook without understanding it. You can cook better if you do understand what is going on, particularly if you want to deviate from the ways that people have cooked before. If you want to follow a recipe exactly, slavishly, what the hell, you can do it without understanding it. As a rote automaton, you can say, "yes, I mixed this, I cook at this temperature" and so forth. But if you want to do something really different, if you want to go color outside the lines, if you want to go outside of the recipe, it helps if you have some intuition as to how things work."
"Recent research concerning the welfare of others, etc. affects not only how to think about certain emotions, but also overturns how most models of reciprocity and exchange, with implications about how people think about modern markets, political systems, and societies. What are these new approaches to human motivation?"
"I am going to speak about what may the most important thing that has ever happened in human history. Violence has declined by dramatic degrees all over the world in many spheres of behavior: genocide, war, human sacrifice, torture, slavery, and the treatment of racial minorities, women, children, and animals."
"Why has cooperation, not competition, always been the key to the evolution of complexity?"
"The power of settings, the power of priming, and the power of unconscious thinking, all of those are a major change in psychology. I can't think of a bigger change in my lifetime. You were asking what's exciting? That's exciting, to me."