The global demographic shift toward an older human population
In short: Humanity is getting older at a staggering pace. This video explores the sociological, biological, and psychological dimensions of aging to explain why this shift matters for our future.
Aging is defined as the physiological decline in biological functions and metabolic adaptation that begins upon reaching adulthood. Biologically, it results from the accumulation of molecular and cellular damage over time, leading to a gradual decrease in physical and mental capacity. These changes are non-linear and only loosely associated with chronological age.
The demographic shift is profound: by 2050, the global population of people aged 60 and older is expected to reach 2.1 billion—a doubling from 2020 levels. While high-income countries like Japan already see significant proportions of older residents, low- and middle-income countries will experience the most dramatic changes by mid-century.
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Sources
- Summary by Intellect · source: Age & Aging: Crash Course Sociology #36
- Also: Ageing and health
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