In Friendship, journalist Lydia Denworth visits the front lines of the science of friendship finding it to be as old as life on the African savannas. She also discovers that friendship is reflected in our brain waves, detectable in our genomes, and capable of strengthening our cardiovascular and immune systems. Its opposite, loneliness, can kill. As a result, social connection is finally being recognised as critical to our physical and emotional well-being.
Our notion of friendship stems from our ancestral connections with nature.