Early economists, neglecting the possibility of scientific and technical progress that would improve the means of production, used the law of diminishing returns to predict that as population expanded in the world, output per head would fall, to the point where the level of misery would keep the population from increasing further.
As populations expand, a concerted effort needs to be made to avoid the destabilising factors that result from youth exclusion and lack of equitable growth.
While in many areas ceramic evidence suggests cultural continuity over many centuries, within these boundaries there was considerable movement as populations expanded and found available resources inadequate.
Over the years, control of the instruments of mass communication has fallen into the hands of relatively small (some claim diminishing) numbers of professional communicators who seem, as populations expand and interest widens, to reach ever-increasing numbers of people.
As populations expand, the number of mutations increases, boosting the chances for a beneficial genetic variant that can improve survival and sweep through a population (in the same way that a large population of insects develops a gene for resistance to a pesticide faster than a small population).
The rationale behind this reasoning is that, as populations expand out of origins, genetic diversity will be lost as a consequence of the (usually) small population sizes involved in such expansions ("founder effect"), see [12] for review).
In an era marked by global efforts to sustainably increase food and energy production as populations expand and climate changes, improved understanding of microbial interactions that influence plant adaptation could provide technological breakthroughs with which to address these challenges.
So although genetic diversity within specific source lineages decreased as populations expanded northwards [see also [ 10]], total genetic diversity at the limits of the non-native range remained high due to contributions from multiple source lineages.
Although parasites were cloned by micromanipulation or limiting dilution, and it is generally accepted that this method would produce true single-clone parent lines, we are necessarily dealing with these 'individuals' as populations expanded in culture.
Forests will remain under threat so long as global population expands.
