"Now" is the period in which people feel they live and act and have responsibility. For most of us, "now" is about a week, sometimes a year. For some traditional tribes in the American northeast and Australia, "now" is seven generations back and forward (350 years). Just as the Earth photographs gave us a sense of "the big here," we need things which gives people a sense of "the long now." (That phrase comes from British musician and artist Brian Eno.)

Via ddrrnt