Our bodies and brains evolved to survive and reproduce, not to make life easy. Evolutionary biology explains several hard constraints:
- Pain and injury: Pain signals harm and motivates avoidance, but it also brings suffering. Nociception protects us, yet chronic or intense pain reduces quality of life (Fields, 2018).
- Needs (hunger, thirst, sleep): Homeostatic drives force us to allocate time and energy to obtaining food, fluids, and rest. These needs compete with other goals and create vulnerability when resources are scarce (McEwen, 2006).
- Aging and decline: Cellular damage accumulates across the lifespan (telomere shortening, oxidative stress), causing loss of function and increased disease risk. Aging limits stamina, resilience, and time to accomplish projects (Kirkwood, 2005).
- Death and uncertainty: Mortality is inevitable; its prospect shapes choices, anxiety, and long-term planning. Awareness of death can motivate meaning-making but also provoke existential distress (Becker, 1973).
These biological constraints are adaptive in evolutionary terms — they helped our ancestors survive and reproduce — but they also produce unavoidable hardships in individual lives.
References:
- Fields, H. (2018). Why We Hurt: The New Science of Pain. Harvard University Press.
- McEwen, B. S. (2006). Protective and damaging effects of stress mediators. New England Journal of Medicine, 338(3), 171–179.
- Kirkwood, T. B. (2005). Understanding the odd science of aging. Cell, 120(4), 437–447.
- Becker, E. (1973). The Denial of Death. Free Press.