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Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/PBSDSDonateUploaded 20-12-17Don't miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_subYou can learn more about your personal DNA story by going to https://23andMe.com/okay ↓↓↓ More info and sources below ↓↓↓Why do we love people we're related to? Compared to strangers, why do we feel such a deep sense of connection with our family members? Sure, they're nice to us, we take care of each other, and we often live with them, but there has to be a deeper biological reason. That reason, unsurprisingly is evolution. In this video, I explain why taking care of our family, or even dying for them, makes sense in the eyes of evolution. SOURCES:This video covers more than a half century of evolutionary biology theory and observation, but here's some reading if you'd like to learn more:Dawkins, Richard. (1976) "The Selfish Gene" http://amzn.to/2Dhd257 Fisher, R. A. (1930). "The Genetical Theory of Natural Selection" http://www.worldcat.org/oclc/880368061 Haldane, J.B.S. (1932). "The Causes of Evolution." London: Longmans, Green and Co.Hamilton, W. D. (1963). "The evolution of altruistic behavior." The American Naturalist, 97(896), 354-356.Hamilton, W. D. (1964). "The genetical evolution of social behaviour I." Journal of Theoretical Biology, 7(1), 1-16.-----------FOLLOW US:Merch: https://store.dftba.com/collections/its-okay-to-be-smart Facebook: http://www.facebook.com/itsokaytobesmartTwitter: @okaytobesmart @DrJoeHansonTumblr: http://www.itsokaytobesmart.com Instagram: @DrJoeHansonSnapchat: YoDrJoe-----------It's Okay To Be Smart is hosted by Joe Hanson, Ph.D.Director: Joe NicolosiWriter: Stephanie KeepProducer/editor/animator: Andrew Orsak Producer: Stephanie Noone and Amanda FoxProduced by PBS Digital StudiosMusic via APMStock images from Shutterstock http://www.shutterstock.com Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
