my name is gregory walsh. i have been very much looking forward to reading the book cover since the speech you gave three or four years ago at the conference on the same topic. i was, however, wondering if you could comment on some allegations made in a book recently redbook -- a blank on the name, the prehistoric origins of modern sexuality in which the author alleges that some of the the present above rates of violence among hunter gatherer cultures, not state people's tonight is erroneous. they allege, for example, that the data at the time was collected, people had contact with modern society for many decades, that they are not, in fact, nomadic but are settled peoples. i was just curious cercis reading that, to hear your response to some of those allegations. >> those allegations, but the data that i present caught many are from people that had no contact with the europeans, examples of stole thence from pre-columbian. many of them are also from hunter-gatherer's court into of horticulturalist people also

. >> hi, my name is gregory walsh. i want to say i've been really looking forward to reading this book ever since seeing a speech he gave three or four years ago at the ted conference on the same topic. i was however wondering if you could comment on some allegations made in a book i recently read called -- i've got a blink of an income of sex at dawn, the prehistoric origins of modern sexuality in which this author as well as some of the data you present about rates of violence among hunter gatherer cultures, which are called on state peoples tonight is erroneous. they allege, for example, that the data at the time i was collect it had had contact with modern society for many decades, that they are not in fact a mandate. they are settled peoples. i've just been curious ever since reading that to hear your response to some of those allegations. >> not necessarily those allegations, but the data i present -- many are from people who definitely had no contact with any europeans, such as skeletons from pre-columbian nativ