According to consequentialism, we should always put our resources where they will do the most good. A small contribution to a reputable aid agency can save a child from a crippling illness. We should thus devote all our energies to charity work, as well as all our money, till we reach the point wher[...]

Imagine living in the future in a world already damaged by humankind, a world where resources are insufficient to meet everyone's basic needs and where a chaotic climate makes life precarious. Then imagine looking back into the past, back to our own time and assessing the ethics of the early twenty-[...]