Abortion

RIchard Dawkins famous atheist:

A consequentialist or utilitarian is likely to approach the abortion question in a very different way, by trying to weigh up suffering. Does the embryo suffer? (Presumably not if it is aborted before it has a nervous system; and even if it is old enough to have a nervous system it surely suffers less than, say, an adult cow in a slaughterhouse.) (2006, p. 293, parenthetical item in orig., emp. added).

Which means:

logically permissible to kill any person as long as they do not suffer, or others (like parents or siblings) do not suffer because of their deaths. Suppose, then, a society decides that five-year-old orphans with no siblings are less than ideal and need to be eliminated.

Or even further:

Peter Singer admits the reality of this logical implication of atheistic evolution. In his chapter titled: “Justifying Infanticide,” Singer concluded that human infants are “replaceable.” What does Singer mean by “replaceable”? He points out that if a mother has decided that she will have two children, and the second child is born with hemophilia, then that infant can be disposed of and replaced by another child without violating any moral code of ethics. He explained: “Therefore, if killing the hemophiliac infant has no adverse effect on others, it would, according to the total view, be right to kill him. The total view treats infants as replaceable” (2000, p. 190).