Although our morals are subjective and may of course change over time, it is also true I think to say that in order to serve us as useful tools they must remain fixed with a certain framework. This framework must be such that it serves as a positive behaviour mechanism that allows us not only as a species but also as a society to prosper and coexist in such a way that the survival of our species is not threatened.
As soon as our moral behaviour falls outside this framework and jeopardises our future survival it is the nature of evolution that it will be breed out, or de-selected if you like. So, in a very real sense, a lot of our key morals can in some way be considered objective in that they are key to our species and in evolutionary terms, the survival of our species. They may not have been imposed on us by a celestial hierarchy but instead, like many aspects of human behaviour, the very fact that they are present requires that they have been naturally selected as an advantage to us as a species.
As soon as our moral behaviour falls outside this framework and jeopardises our future survival it is the nature of evolution that it will be breed out, or de-selected if you like. So, in a very real sense, a lot of our key morals can in some way be considered objective in that they are key to our species and in evolutionary terms, the survival of our species. They may not have been imposed on us by a celestial hierarchy but instead, like many aspects of human behaviour, the very fact that they are present requires that they have been naturally selected as an advantage to us as a species.
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