Quotes About Population

Human populations of only a few hundred people were unable to survive indefinitely in complete isolation. A population of 4,000 was able to survive for 10,000 years, but with significant cultural losses and significant failures to invent, leaving it with a uniquely simplified material culture.

Thus, immigrants from Korea really did make a big contribution to the modern Japanese, though we cannot yet say whether that was because of massive immigration or else modest immigration amplified by a high rate of population increase. The Ainu are more nearly the descendants of Japan's ancient Jomon inhabitants, mixed with Korean genes of Yayoi colonists and of the modern Japanese.

human population densities were gradually rising throughout the late Pleistocene anyway, thanks to improvements in human technology for collecting and processing wild foods. As population densities rose, food production became increasingly favored because it provided the increased food outputs needed to feed all those people.

Larger populations mean more inventors and more competing societies.

My best-case scenario for the future is that China's government will recognize that its environmental problems pose an even graver threat that did its problem of population growth. It may then conclude that China's interests require environmental policies as bold, and as effectively carried out, as its family planning policies.

En toda América, las enfermedades introducidas con los europeos se propagaron de una tribu a otra mucho antes que los propios europeos, causando la muerte de aproximadamente el 95 por ciento de la población indígena americana precolombina.

In an epidemic those people with genes for resistance to that particular microbe are more likely to survive than are people lacking such genes. As a result, over the course of history, human populations repeatedly exposed to a particular pathogen have come to consist of a higher proportion of individuals with those genes for resistance—just because unfortunate individuals without the genes were less likely to survive to pass their genes on to babies.

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.

As a result, over the course of history, human populations repeatedly exposed to a particular pathogen have come to consist of a higher proportion of individuals with those genes for resistance—just because unfortunate individuals without the genes were less likely to survive to pass their genes on to babies.

Peoples of the Fertile Crescent domesticated local plants much earlier. They domesticated far more species, domesticated far more productive or valuable species, domesticated a much wider range of types of crops, developed intensified food production and dense human populations more rapidly, and as a result entered the modern world with more advanced technology, more complex political organization, and more epidemic diseases with which to infect other peoples.

To sustain themselves, they need a human population that is sufficiently numerous, and sufficiently densely packed, that a numerous new crop of susceptible children is available for infection by the time the disease would otherwise be waning. Hence measles and similar diseases are also known as crowd diseases.

For instance, the Karimui Basin of the New Guinea highlands, where I worked in the 1960s, was occupied by an isolated population of a few thousand people, suffering from the world's highest incidence of leprosy—about 40 percent! Finally, small human populations are also susceptible to nonfatal infections against which we don't develop immunity, with the result that the same person can become reinfected after recovering. That happens with hookworm and many other parasites.

THE BIGGEST POPULATION SHIFT OF MODERN TIMES HAS been the colonization of the New World by Europeans, and the resulting conquest, numerical reduction, or complete disappearance of most groups of Native Americans

Cumulative mortalities of these previously unexposed peoples from Eurasian germs ranged from 50 percent to 100 percent. For instance, the Indian population of Hispaniola declined from around 8 million, when Columbus arrived in A.D. 1492, to zero by 1535.

the Indian population of Hispaniola declined from around 8 million, when Columbus arrived in A.D. 1492, to zero by 1535.

Throughout the Americas, diseases introduced with Europeans spread from tribe to tribe far in advance of the Europeans themselves, killing an estimated 95 percent of the pre-Columbian Native American population. The

It turns out that, in addition to China's eight 'big' languages—Mandarin and its seven close relatives (often referred to collectively simply as 'Chinese'), with between 11 million and 800 million speakers each—China also has over 130 'little' languages, many of them with just a few thousand speakers.

As a result, one acre can feed many more herders and farmers—typically, 10 to 100 times more—than hunter-gatherers. That strength of brute numbers was the first of many military advantages that food-producing tribes gained over hunter-gatherer tribes.

By comparison with high population densities in Japan and Java and China, Australia looked empty and attractive to Asian invasion—so thought the prime minister, but Asians themselves did not think that way.

An alternative way of expressing births is by what's called the total fertility rate: i.e., the total number of babies born to an average woman over her lifetime. For the whole world that number averages 2.5 babies; for the First World countries with the biggest economies, it varies between 1.3 and 2.0 babies (e.g., 1.9 for the U.S.). The number for Japan is only 1.27 babies, at the low end of the spectrum; South Korea and Poland are among the few countries with lower values.

The population that I already mentioned as having the world's lowest recorded salt intake, Brazil's Yanomamo Indians, also had the world's lowest average blood pressure, an astonishingly low 96 over 61.

Dans tout pays qui se dépeuple, l'état tend à sa ruine ; et le pays qui peuple le plus, fût-il le plus pauvre, est infailliblement le mieux gouverné.

Now we just really need to do the work, which we're doing, to get contraceptives out to women worldwide.

We need diversity in our population to make it work.