Survival of the fittest
Richard Dawkins once wrote nature is not cruel, only pitiless indifferent. But nature evens it out by the "survival of the fittest" rule - the strongest, the most able, the most fit to survive do so, and those that cannot evolve don't. In society, the "survival of the fittest rule" also applies, but the concept of "fittest" has been corrupted over the years. Survival is no longer a matter of adaptation and ability, but rather a matter of opportunity, compromise, deception and flat-out treachery. Or perhaps these are not marks of corruption, but the exact qualities required to survive in society.