They lead two intellectual schools - sometimes called the Malthusians and the Cornucopians, sometimes simply the doomsters and the boomsters - that use the latest in computer-generated graphs and foundation-generated funds to debate whether the world is getting better or going to the dogs. It was a bet between the Cassandra and the Dr.
Specifically, the bet was over the future price of five metals, but at stake was much more - a view of the planet's ultimate limits, a vision of humanity's destiny. In 1980 an ecologist and an economist chose a refreshingly unacademic way to resolve their differences.
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