Ya, I'm not fond of Harris' ethical naturalism. I concede that science has the ability to help inform moral action, when it comes to the welfare of living things, but it does not necessarily guide us towards any moral decision. I have always agreed with Gould's approach of keep science and religion separate things. Science is a useful method for understanding natural phenomena, it is not a useful guide to how we should treat others. An explanation of how things are does not necessarily inform how things should be.