"Every one of us possesses an armoury of instincts which keep us alive. We are often barely aware of them, but they act every day to protect us from danger and keep us fit and healthy. In the first programme of the Human Instinct series we explore how this most basic of instincts means we're all born to survive."

http://www.bbc.co.uk/science/humanbody/tv/humaninstinct/programme1.shtml

Related:
Human Instinct - The Will to Win
http://www.videosift.com/video/BBC-Human-Instict-The-Will-to-Win
Human Instinct - Deepest Desires
http://www.videosift.com/video/BBC-Human-Instict-Deepest-Desires
Human Instinct - Natural Born Heroes
http://www.videosift.com/video/BBC-Human-Instinct-Natural-Born-Heroes