I've just landed in San Francisco. It's late at night, I'm staying in a collective living/hosting home in the Haight, and despite fatigue, this city always puts a pep in my step. Long periods of travel, especially being stuck on tarmacs or in TSA lines, tend to wear me out. Cities, also, tend to wear me out. I am nourished by periods in nature, so urban excitements don't thrill me the way they did in my youth. Today is a bit of an exception because I'm attending the Global Cl