“it will be objected that a constantly increasing population makes resistance and conservation a hopeless battle. this is true. unless a way is found to stabilize the nation's population, the parks can not be saved. or anything else worth a damn. wilderness preservation, like a hundred other good causes, will be forgotten under the overwhelming pressure of a struggle for mere survival and sanity in a completely urbanized, completely industrialized, ever more crowded environment. for my own part i would rather take my chances in a thermonuclear war than live in such a world.”

“‎Using his burgeoning intelligence, this most successful of all mammals has exploited the environment to produce food for an ever increasing population. Instead of controlling the environment for the benefit of the population, perhaps it's time we controlled the population to allow the survival of the environment.”

“The more civilized a nation, the more conformed its population, until that civilization's last age arrives, when multiplicity wages war with conformity. The former grows ever wilder, ever more dysfunctional in its extremities; whilst the latter seeks to increase its measure of control, until such efforts acquire diabolical tyranny.'- Traveller”

“Having people in different optimal environments increases the chances of survival of the human race as a whole. It is nature's way to preserve her species.”

“Whosoever will save his life shall lose it: And whosoever will lose his life for my sake shall find it.’ [Matthew 16:25.]…He who is ‘The Way, the Truth and the Life’ [see John 14:6] has herein set forth an immutable law. …Specifically stated, this law is, ‘We live our lives most completely when we strive to make the world better and happier.’ The law of pure nature, survival of the fittest, is self-preservation at the sacrifice of all else; but in contrast to this the law of true spiritual life is, deny self for the good of others. …”

“Not until the beginning of the 20th century did Europe's urban populations finally become self-sustaining: before then, constant immigration of healthy peasants from the countryside was necessary to make up for the constant deaths of city dwellers from crowd diseases.”