Abstract

Transhumanists are ambitious. We want unlimited lifespan, unlimited intelligence, unlimited computer power. But this doesn't mean that we're ambitious about everything, for example height. Perhaps we want to be a bit taller, and we want to ensure that e.g. midgets have the opportunity to reach "normal" stature. Yet even in Second Life, or in tomorrow's immersive virtual realities, we don't for the most part want to be 1000 metres tall - despite freedom from the constraints of gravity. Of course, there are some very exotic creatures in Second Life: they might say the rest of us have stunted imaginations. But intuitively, there is quite a narrow optimum for body height. Moreover, height may be regarded as what economists call a "positional good". It's socially advantageous to be slightly taller than average; but if everyone were to become taller, then no one would be better off.