As we progress as a species of intelligent mammals our way of life changes. One problem is the usage of limited resources. Of fuels and such. This won't be a problem when we become advanced enough to use renewable energy, which we have already started to do with solar power and electricity. But we are no longer living in small communities. Most of us live in cities. This is a required step to take of the sacrifices needed to advance. Thibk about it. If we don't advance as a species, what will happen when a comet comes hurdling towards us? If we are advanced enough, we could destroy it before it reaches us. But if we aren't advanced and are living in "the good old days" we would all be destroyed. Goodnight Seattle it was a pleasure performing in front of such a wonderful audience.