20th+

Demography (from prefix demo- from Ancient Greek δῆμος (dēmos) meaning 'the people', and -graphy from γράφω (graphō) meaning 'writing, description or measurement') is the statistical study of populations, especially human beings.

Demographic analysis can cover whole societies or groups defined by criteria such as education, nationality, religion, and ethnicity. Educational institutions usually treat demography as a field of sociology, though there are a number of independent demography departments.

Formal demography limits its object of study to the measurement of population processes, while the broader field of social demography or population studies also analyses the relationships between economic, social, cultural, and biological processes influencing a population.

The Populations can change through three processes: fertility, mortality, and migration. Fertility involves the number of children that women have and is to be contrasted with fecundity (a woman's childbearing potential). Mortality is the study of the causes, consequences, and measurement of processes affecting death to members of the population. Demographers most commonly study mortality using the Life Table, a statistical device that provides information about the mortality conditions (most notably the life expectancy) in the population.

Migration refers to the movement of persons from a locality of origin to a destination place across some predefined, political boundary. Migration researchers do not designate movements 'migrations' unless they are somewhat permanent. Thus demographers do not consider tourists and travellers to be migrating. While demographers who study migration typically do so through census data on place of residence, indirect sources of data including tax forms and labour force surveys are also important.

Crude birth rate, the annual number of live births per 1,000 people.
The general fertility rate, the annual number of live births per 1,000 women of childbearing age (often taken to be from 15 to 49 years old, but sometimes from 15 to 44).
The age-specific fertility rates, the annual number of live births per 1,000 women in particular age groups (usually age 15–19, 20-24 etc.)
The crude death rate, the annual number of deaths per 1,000 people.
The infant mortality rate, the annual number of deaths of children less than 1 year old per 1,000 live births.
The expectation of life (or life expectancy), the number of years that an individual at a given age could expect to live at present mortality levels.
The total fertility rate, the number of live births per woman completing her reproductive life, if her childbearing at each age reflected current age-specific fertility rates.
The replacement level fertility, the average number of children women must have in order to replace the population for the next generation. For example, the replacement level fertility in the US is 2.11.
The gross reproduction rate, the number of daughters who would be born to a woman completing her reproductive life at current age-specific fertility rates.
The net reproduction ratio is the expected number of daughters, per newborn prospective mother, who may or may not survive to and through the ages of childbearing.
A stable population, one that has had constant crude birth and death rates for such a long period of time that the percentage of people in every age class remains constant, or equivalently, the population pyramid has an unchanging structure.
A stationary population, one that is both stable and unchanging in size (the difference between crude birth rate and crude death rate is zero).

Demography is today widely taught in many universities across the world, attracting students with initial training in social sciences, statistics or health studies. Being at the crossroads of several disciplines such as sociology, economics, epidemiology, geography, anthropology and history, demography offers tools to approach a large range of population issues by combining a more technical quantitative approach that represents the core of the discipline with many other methods borrowed from social or other sciences.

Thursday, October 20, 2016

Internment of Japanese Americans - 1942-2-19

1942-2-19 Executive Order 9066: Shameful Moment, WW2 America - Time > .

Mass Incarceration Of Japanese Americans In WW2 - Time > .

In 1942, President Roosevelt signed Executive Order 9066 that cleared the way for the incarceration of Japanese Americans in U.S. confinement camps. Men, women, and children of Japanese ancestry were evicted from the West Coast of the United States and held in sites across the country.

Issued by President Franklin Roosevelt on February 19, 1942, this order authorized the evacuation of all persons deemed a threat to national security from the West Coast to relocation centers further inland. In the next 6 months, over 100,000 men, women, and children of Japanese ancestry were moved to assembly centers. They were then evacuated to and confined in isolated, fenced, and guarded relocation centers, known as internment camps.

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Tuesday, October 25, 2016

Democratic Socialism in US

Demographic Engineering Fail

Monday, October 24, 2016

Economies of Nations

Friday, October 21, 2016

Human Propensity for Belligerence

Thursday, October 20, 2016

Internment of Japanese Americans - 1942-2-19

sī vīs pācem, parā bellum