Read this passage from "The Ends of the World as We Know Themni", The shoguns responded with both negative and positive
measures. They reduced wood consumption by turning to
light-timbered construction, to fuel efficient stoves and
heaters, and to coal as a source of energy. At the same
time, they increased wood production by developing and
carefully managing plantation forests. Both the shoguns
and the Japanese peasants took a long term view the
former expected to pass on their power to their children,
and the latter expected to pass on their land. In addition,
Japan's isolation at the time made it obvious that the
country would have to depend on its own resources and
couldn't meet its needs by pillaging other countries. Today,
despite having the highest human population density of
any large developed country, Japan is more than 70
percent forested,
What is Diamond's claim in this passage?