Smart development builds on a region's own skills, resources and local businesses. Dumb growth invites a big corporation in, surrenders control and profits to a distant headquarters, undercuts local manufacturers, and risks layoffs without warning.

Smart development invests in insulation, efficient cars, and ever-renewed sources of energy. Dumb growth crashes around looking for more oil.

Relative to most of the energy and material flows on Earth, the machinations of humankind are puny. The planet's powers are much, much bigger than our own. But in a few sensitive places, we're making an impact on a planetary scale, and that impact is not a good one.

Social services, not wealth per se, seem to be the key to lower birth rates. The Chinese, although among the poorest peoples of the world, have brought their fertility rate down to 2.4, partly by social coercion, but mostly by broadly available education, health care and family planning.