A question on his genetic theory of altruism: although it is to do with allele frequency (interchangeable alternatives) in a specific population, is the argumen

A question on his genetic theory of altruism: although it is to do with allele frequency (interchangeable alternatives) in a specific population, is the argument applicable to a wider conception of a population? This is getting new-agey, but selfish promotion of our genes would logically include helping all mankind, since we share many genes (of course, we'd have more reason to help those more closely related); then, to similar species such as apes, then to mammals, then animals in general, then plants - which we'd prefer over rocks. All based on genetic similarity, of ones own genes helping other instances of itself. Which does seem to fit in which the attitudes of most people.