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 a promontory were,
as well as if a manor of thy friends 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
Devotions upon Emergent Occasions (1624)
"Meditation XVII"