We are, for example, the only animal species that seeks to preserve some of its own predators - Bengal tigers, threatened species of poisonous snake or (to us) harmful insects. Whether we preserve them through conscience, moral choice or acts of will matters less than the fact that this concern for our natural enemies shows that human beings behave abnormally in strict competition/adaptation terms.
Our capacity for moral choice and the free-will of self-sacrifice should teach politicians and scientists that we cannot be strait-jacketed into their convenient belief that selfishness is the only behavioural motive. We deserve more than the condescending simplicities meted out by most politicians and some scientists.
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