Just to be somewhat serious, but from the king's foot, to water? The metric system sure is earthly/humanly to be the logical replacement of the imperial units, which only suffer from painful conversion long remedied by computers (and Google). Why aren't we using units derived directly from the behavior of the universe like, say, Kelvin? What's so special about base 10 and water to be the entire basis of a measuring system? Oddly, people have an extremely easy time doubling things in their head...why not the binary kibi, mebi, gibi, and friends? I don't really believe the 10-finger argument since history indicates some ancient civilizations used different bases (e.g. like base 60, which still haunts us today).