Questions like these must be answered not only about water but about the limits of the other natural resources that are under population pressure _ fertile soil, forests, wildlife, fisheries, open space and the services furnished by ecosystems that are vital to the economy.
12.
Ester Boserup argues in her book " The Conditions of Agricultural Growth : The Economics of Agrarian Change under Population Pressure " ( 1965 ) from inductive, empirical case analysis that Malthus's more deductive conception of a presumed one-to-one relationship with agricultural scale and population is actually reversed.
13.
Improper agricultural practices, for instance, occur only under constraints such as the saturation of good lands under population pressure which leads settlers to cultivate too shallow or too steep soils, plough fallow land before it has recovered its fertility, or attempt to obtain multiple crops by irrigating unsuitable soils.
14.
Thousands of Protestants fled to Protestant controlled states, generally broadening the war, and central Germany was ravaged repeatedly, by some estimates losing between 25 50 % of its pre-war population because the competing armies continually took the food the majority of civilian deaths being caused by the twin side-effects of famine, and deaths from endemic diseases under populations weakened by famine.
