Sort of like the difficulty of the first bird that hatched from a dinosaur egg? Most people see this as a non-issue.
In "A Tale of Two Cities", a man confesses to a capital crime he did not commit so that another, the true love of the woman HE loves, might go free. He gave his life so that she could be happy. He says on his way to the guiotine "It is a far, far, better thing I do than I have ever done before".
Only humans can think like that, and it is absolutely the WORST thing you can do to spread your genes around. True Alturism is the opposite of what would be expected to exist if humans evolved from animals. Yet it does.
This is an important issue, and evolutionists know it. Shall I do a google search and come up with 100 papers on the subject?