I think you need to define what you mean by “morality” a lot more carefully. It’s hard to attribute meaning to the statement “People should act without morals.” Even if you mean “Everyone should act strictly within their own self-interest”, evolutionary psychology would demand that you define the unit of identity (the body? the gene?), and would smuggle most of what we think of as “morality” back into “self-interest”.
I think you need to define what you mean by “morality” a lot more carefully. It’s hard to attribute meaning to the statement “People should act without morals.” Even if you mean “Everyone should act strictly within their own self-interest”, evolutionary psychology would demand that you define the unit of identity (the body? the gene?), and would smuggle most of what we think of as “morality” back into “self-interest”.