The integrity of the whole being defended by repressing the mutiny of individuals.
“The lack of nepotism makes the analogy between people and social insects faulty. Far from embracing vicarious reproduction, we seem to go to great lengths to avoid it. But it does not affect the analogy with chromosomes, which are even more egalitarian about reproduction. Chromosomes may not be altruistic — the do not surrender their right to replicate — but they are something other than selfish. They are ‘groups’: they defend the integrity of the whole genome, suppressing selfish mutinies by individual genes.” (40, The Origins of Virtue)
The Origins of Virtue by Matt Ridley