Ronald A. Lindsay is not known for his airtight rational arguments and his piece on objective morality is true to form.
Morality is relative, not objective. We don’t need objective morality. Morality is a personal sensibility, an emotion, a feeling of what one ought to do or a sense of what one should do.
Human beings function socially absent objective morality. Why do so many atheists persist in arguing fallaciously for something that does not exist and we do not need?
For objective morality to be the case we would need a source for objective truth outside of ourselves, such as a god or some method of obtaining knowledge that is known to be objectively true. Human beings have access to no such thing so why persist in making patently erroneous arguments for something that simply cannot be rationally argued for?