agriculture
    pre-1850 - 85 to 90% farmers
    currently - less than 5% farmers
separation from the physical / natural world
    deforestation
    drainage of wetlands
    improverishmant of the soil
    erosion
    urbanization
        improved sanitation
            waste removal
            water sources
            disease
        the clearances
        separation from nature
        parks and gardens
    industrialization
        power sources
            water
            coal
            steam
    mechanization
        separation from animals
            draft animals
            food animals
    improved transportation
        ships
        roads
        canals
        trains
        trucks
    irrigation and dams
    psychological
        dominion over all things
        adversarial relationship with nature
    insulation from weather
reconnecting to the physical world and its rhythms
    cycle of the year [see Time]
    seasonal round
        all things in their time
            seasonally available foods
            seasonal activities
            seasonal rituals
    lunar cycle
        new, waxing, full, waning
    working with nature
        go with the flow [see Tao]
    stewardship
 
Diary of an Early American Boy - Eric Sloane
Our Vanishing Landscape - ibid
The Tender Carnivore and the Sacred Game - Paul Sheppard