Peter Singer is the opposite of someone you love to hate. Not hate to love, but at some level you know he has some valid perspectives. What makes a human life expendable? Expandable? Does biology define existence? The idea of a triangle exists just as much as the idea of Plato. Which is more ephemeral? With Singer we have a round-robin of moral competitions each competing for virtue and justification. A mental whirling dervish looking down on austerity. There is only one world, not a third world, unless you are talking about third rock from our sun.