Natalism (also called pronatalism or the pro-birth position) is an ideology that promotes the reproduction of human life as an important objective of being human and advocates high birthrate. According to the Merriam-Webster dictionary, the term, as it relates to the belief itself, dates from 1971 and comes from , formed from , birthrate.

Natalism promotes child-bearing and parenthood as desirable for social reasons and to ensure the continuance of humanity. Natalism in public policy typically seeks to create financial and social incentives for populations to reproduce, such as providing tax incentives that reward having and supporting children. Those who adhere to more strict interpretations of natalism may seek to limit access to abortion and contraception, as well. The opposite of natalism is antinatalism.

Motives

Religion
Many religions encourage procreation and religiousness in members is tied to higher fertility rates. Judaism, Islam, and major branches of Christianity, including the Church of Jesus Christ of Latter-day Saints and the Catholic Church encourage procreation. In 1979 one research paper indicated that Amish people had an average of 6.8 children per family. A movement among conservative Protestants, known as the Quiverfull movement, advocates for large families and views children as blessings from God.

Intention to have children

An intention to have children is a substantial fertility factor in actually ending up doing so, but childless individuals who intend to have children immediately or within two or three years are generally more likely to succeed than those who intend to have children in the long term.
There are many determinants of the intention to have children, including:
The mother's preference of family size, which influences that of the children through early adulthood. Likewise, the extended family influences fertility intentions, with increased number of nephews and nieces increasing the preferred number of children.
Social pressure from kin and friends to have another child.
Social support. However, a study from West Germany came to the result that both men receiving no support at all and men receiving support from many different people have a lower probability of intending to have another child, with the latter probably related to coordination problems.
Happiness, with happier people tending to want more children.
Secure housing situation.

Natalistic politics

According to the UN, the share of countries with pronatalist policies had grown from 20% in 2005 to 28% in 2019.

Some countries with population decline offer incentives to the people to have large families as a means of national efforts to reverse declining populations. Incentives may include a one-time baby bonus, or ongoing child benefit payments or tax reductions. Some impose penalties or taxes on those with fewer children. Some nations, such as Japan, Singapore, South Korea, and Taiwan, have implemented, or tried to implement, interventionist natalist policies, creating incentives for larger families among native stock. Immigrants are generally not part of natalist policies.

Paid maternity and paternity leave policies can also be used as an incentive. For example, Sweden has generous parental leave wherein parents are entitled to share 16 months' paid leave per child, the cost divided between both employer and state.

Books advocating natalist policies include What to Expect When No One's Expecting by Jonathan V. Last.

Russia
Natalist thinking was common during the Soviet times. After a brief adherence to the strict Communist doctrine in 1920s and attempts to raise children communally, coupled with the government-provided healthcare, the Soviet government switched to neo-traditionalism, promoting family values and sobriety, banning abortions and making divorces harder to obtain, advancing natalist propaganda that made mockery of irresponsible parents. The expanded opportunities for female employment caused a population crisis in 1930s, government had expanded access to child care starting at age of two.  After the Great Patriotic war the skewed ratio of men to women prompted additional financial assistance to women that had children or were pregnant. Despite the natalist social advertising and long maternity leave with maintenance of the employment and salary, the birthrates continued slide into the 1970's.  

The end of USSR in 1991 was accompanied by a large drop in fertility. In 2006, Vladimir Putin made the demographics an important issue,  instituting a two-prong approach of direct financial rewards and socio-cultural propaganda. The notable example of the former is the maternal-capital program where the woman is provided with subsidies that can be spent only on improved housing or the education of a child (and can also be saved for the retirement).

Hungary
The Hungarian government of Viktor Orbán in 2019 announced pecuniary incentives (including eliminating taxes for mothers with more than three children, and reducing credit payments and easier access to loans), and expanding day care and kindergarten access.

See also

 Child tax credit
 Fecundity
 Human overpopulation
 Natural fertility
 Political demography
 Population ethics
 Replacement fertility rate
 Tax on childlessness

References

Sources 
 

 
Human population planning
Philosophy of biology