Pillar VI
Keystone
Stewardship of the Physical World
Keystone is about the physical world in its own units. We decide about buildings, bridges, water and metals in the unit of the administrator, a budget year, a price cycle, a tonne of CO2, while the object has a unit of its own: a lifespan, a stock, a material chain. Two errors follow from that mismatch, one in time and one in matter, and one correction: an instrument that forces the reckoning into the unit of the object.