The author describes the development of the various forms of power over
many centuries, such as the power supplied by human strength, the wind,
water, electricity, nuclear energy, etc.
He points out how the exploitation of a specific form of power has led to the
economic growth and welfare of various countries, e.g. the use of the wind
and water by the Netherlands.
Finally, the author stresses the fact that the world is facing a serious power
crisis, especially since the Arabian countries started increasing oil prices in
1973. Consequently, the search for new forms of power such as fusion energy,
should be continued unceasingly.