“We”? Amerika and Liberia are the only two nations on Earth which haven’t officially adopted metric. There are plenty of people on Fluther not from Amerika or Liberia. And the reason Amerikans don’t adopt metric is the same reason they don’t have universal health care, and that 21% believe the Sun orbits the Earth: a combination of unwarranted arrogance and crushing ignorance caused by a deliberately sabotaged educational system.