"Death is very likely the single best invention of Life" considered one of the best quotes delivered ever by Steve Jobs.
Any invention can be termed as the "BEST" when all of those whom you target (i.e. your target group) "USES" it. Death is one such invention. Everyone uses it (i.e. everyone dies). No matter how much you try to avoid it or how much you run away from it or how much more you want to live, you have to die. You just can't escape it. Hence it's very likely the single best invention of life.