Population & Associated Issues

Overview

Twin Demographic Challenges	India is experiencing a historic demographic transition: the "population explosion" has ended, with fertility falling below replacement levels. The challenge is now two-fold: (1) capitalizing on a temporary window of a young "demographic dividend" before it closes, and (2) preparing social security and healthcare infrastructure for a rapidly aging population in southern and western states.

1. Demographic Transition Stages

Year of Great Divide (1921)	In census history, the period before 1921 was marked by stagnant or negative population growth due to high mortality from famines, plague, and influenza. After 1921, mortality declined consistently due to improved sanitation and food security, leading to steady population acceleration.
Current Stage	India has entered Stage 3/4 of demographic transition, characterized by low mortality and rapidly declining fertility.
Total Fertility Rate (TFR)	Dropped to 2.0 (NFHS-5), below the demographic replacement level of 2.1 (the rate at which a population replaces itself from one generation to the next without migration).

2. Key Population Indicators

Sex Ratio	NFHS-5 recorded a sex ratio of 1020 females per 1000 males, though the Sex Ratio at Birth (SRB) remains skewed at 929, indicating persistent son-meta preference and sex-selective practices.
Population Momentum	Phenomenon where a population continues to grow despite fertility falling below replacement level. Occurs because of a large, historically young age cohort entering their reproductive years, ensuring absolute population growth for 3-4 more decades.

3. Demographic Dividend & Aging

Demographic Dividend	Economic growth potential resulting from shifts in population age structure, specifically when the working-age population (15-64) exceeds the dependent population (children and elderly). India's window opened in 2005-06 and is projected to last until 2055-56. Harnessing it requires urgent investments in health, quality education, vocational skilling, and job creation; otherwise, high youth unemployment turns it into a "demographic disaster".
Elderly Population Projections	By 2050, the elderly population (60+) in India is expected to double, accounting for nearly 20% of total population (over 300 million people).
Silver Economy Impact	Requires a shift in policy focus toward geriatric healthcare, portable pension schemes, elder-friendly urban infrastructure, and social security programs to support a rising dependency ratio.

4. Gender Gaps & Dependency

Missing Women	Term coined by economist Amartya Sen referring to millions of women who are absent from the population due to gender-biased sex selection, female infanticide/foeticide, and systemic nutritional and medical neglect.
Dependency Ratio	Ratio of dependents (those aged under 15 and over 64) to the working-age population. A declining birth rate initially lowers child dependency ratio (economic boon), but eventually increases old-age dependency ratio, placing a strain on public finances, pensions, and healthcare systems.

UPSC High-Yield Recall

TFR 2.1	Replacement Level Fertility where a population exactly replaces itself from one generation to the next.
NFHS-5	Primary source for recent health and population data (TFR 2.0, Sex Ratio 1020).
1921	Known as the "Year of Great Divide" in Indian census history.