Dr. Gregory House: There's an evolutionary imperative why we give a crap about our family and friends, and there's an evolutionary imperative why we don't give a crap about anybody else. If we loved all people indiscriminately, we couldn't function.
This quote occurs at 00:12:24-00:12:36 in the video.
A doctor campaigns against the epidemic of TB in Africa, possibly at the risk of his own life.
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