While I was pondering the Ubuntu philosophy below, I remembered the following quote which also sums up the that philosophy, but from a different angle:
No man is an island, entire of itself; every man is a piece of the continent, a part of the main. If a clod be washed away by the sea, Europe is the less, as well as if promontory were, as well as if a manor of thy friend’s or of thine own were. Any man’s death diminishes me, because I am involved in mankind; and therefore never send to know for whom the bell tolls; it tolls for thee.
– John Donne – Meditation XVII (1623)