Enough, and to Spare

A recent article, "Global human population has surpassed Earth’s sustainable carrying capacity" by Corey J.A. Bradshaw and colleagues (including Paul R. Ehrlich and Mathis Wackernagel), was published in Environmental Research Letters (21(6), 064023, March 2026). It analyzes global population data from 1800–2023 using ecological growth models (primarily a Ricker logistic model fitted to instantaneous population growth rates r versus population size N). The authors identify a historical "facilitation phase" (roughly pre-1950s) where larger populations drove faster growth rates through ingenuity, fossil fuels, and technology. This shifted to a "negative demographic phase" starting around 1962, where growth rates decline as population increases. They project a peak of 11.7–12.4 billion people between 2067 and 2076 under current trends. However, they estimate Earth's "sustainable carrying capacity" (based on the facilitation phase) at only about 2.5 billion—roughly mid-20th-century levels—arguing that humanity entered overshoot decades ago.

The paper correlates the negative phase with rising global temperature anomalies, ecological footprint (exceeding Earth's biocapacity since 1970, now ~1.7 Earths), and total emissions, claiming population size explains more variation in these stressors than per-capita consumption. Their core conclusion: "The Earth cannot sustain the future human population, or even today’s, without a major overhaul of socio-cultural practices for using land, water, energy, biodiversity, and other resources." They frame this as a biological/ecological signal of limits, enabled temporarily by fossil-fuel stock depletion but ultimately unsustainable.

Contrast with Biblical Truth: God’s Abundance ("Enough and to Spare") vs. the Article’s Scarcity Narrative

Biblical revelation presents a fundamentally different view of resources and human population. Scripture affirms that God created a world with abundant provision and explicitly commands humanity to multiply and fill it. Genesis 1:28 records God’s blessing and mandate to the first humans: “Be fruitful and multiply and fill the earth and subdue it, and have dominion over the fish of the sea and over the birds of the heavens and over every living thing that moves on the earth” (ESV; repeated to Noah in Genesis 9:1 after the Flood). This is not a suggestion but a divine commission tied to humanity’s unique creation in God’s image (Genesis 1:26–27). The command to “fill the earth” implies active population growth and stewardship, not restraint or reduction.

The article’s Malthusian-style conclusion—that current and projected populations exceed sustainable limits and require drastic socio-cultural overhaul (implicitly including slower growth or smaller populations)—directly contradicts this. It portrays Earth as fundamentally resource-constrained, with humanity in permanent overshoot. In contrast, the Bible teaches God’s deliberate provision of abundance. A clear parallel to the queried phrase “enough and to spare” appears in Doctrine and Covenants 104:17 (“the earth is full, and there is enough and to spare”), which echoes broader biblical themes of divine generosity (e.g., Philippians 4:19: “And my God will supply every need of yours according to his riches in glory in Christ Jesus”; Matthew 6:25–34 on God’s care for His people; the miracles of manna in Exodus 16 or Jesus feeding multitudes in Matthew 14–15). God prepared the earth with regenerative capacity and gave humans agency as stewards, not as victims of fixed limits. The article’s scarcity mindset assumes finite, depleting stocks without accounting for the Creator’s ongoing sustenance or human creativity enabled by the imago Dei.

Evolutionary Biases and Ignoring the Command to “Fill the Earth”

The paper exhibits clear evolutionary and naturalistic biases by applying standard ecological models (Ricker/Gompertz logistic growth, typically used for wildlife populations) directly to humans. It describes humans as “the ultimate ecosystem engineers” who temporarily escaped regenerative constraints via fossil fuels, but ultimately face the same density-dependent limits as any species. References to hunter-gatherer growth rates and biological carrying capacity (K) treat humanity as just another evolved animal in a closed system, without reference to special creation, divine image-bearing, or transcendent purpose. This framework assumes deep-time naturalistic processes and ignores the biblical account of a designed world under sovereign provision.

Critically, the article ignores (and implicitly opposes) God’s explicit command to “fill the earth.” Population growth is framed as the primary driver of environmental degradation, with calls for smaller populations and reduced consumption to achieve “better outcomes for both people and the planet.” This inverts the biblical mandate: instead of viewing multiplication as obedience and blessing, it treats it as the problem requiring intervention. Regional analyses note later onset of the negative phase in high-fertility, low-income areas (e.g., Sub-Saharan Africa), subtly echoing concerns over “overpopulation” in developing regions—precisely where the command to fill and subdue has yet to reach full expression. There is no acknowledgment of humanity’s unique role as image-bearers tasked with responsible dominion, innovation, and care.

Scientific Argument Supporting the Biblical Commands

Empirical data robustly supports the biblical vision of abundance through dominion, stewardship, and multiplication rather than the article’s fixed-limits model. Human population has grown from under 1 billion in 1800 to over 8 billion today, yet key indicators of well-being have improved dramatically—contrary to neo-Malthusian predictions:

• Expanding carrying capacity via innovation: The Green Revolution (1940s–1960s onward) tripled cereal yields through high-yield varieties, fertilizers, and irrigation, feeding billions more without proportional land expansion. Modern advances—GM crops, precision agriculture, vertical farming, desalination, and nuclear/renewable energy—continue to raise effective resource availability. “Carrying capacity” is not static; it grows with knowledge, exactly as expected from image-bearing humans exercising dominion (Genesis 1:28).

• Historical trends refute overshoot alarmism: Long-term resource prices have trended downward despite population growth (Julian Simon’s “ultimate resource” thesis—human minds solve problems). The Simon-Ehrlich wager (1980) famously saw Simon win: prices of five metals fell even as population rose. Global food production per capita has risen; extreme poverty has plummeted (from ~42% in 1980 to under 9% today); life expectancy has doubled since 1900. These gains occurred alongside the very population increase the article deems unsustainable.

• Ecological footprint and planetary boundaries are dynamic: While the article cites biocapacity deficits since 1970, technological decoupling (e.g., dematerialization, efficiency gains, reforestation in developed nations) shows human ingenuity can restore and expand regenerative capacity. Fertility rates are already declining naturally with development and urbanization (many nations below replacement level), projecting a likely peak and gentle decline later this century—without coercive measures. Population density remains low globally; vast arable land and ocean resources remain underutilized.

• Population size as a net positive: Larger populations historically accelerate innovation (more minds = more solutions), as seen in the facilitation phase the authors themselves document. Biblical stewardship—wise use, not exploitation—aligns with observed progress when paired with free markets, property rights, and ethical governance. The article’s correlation of population size with emissions/temperature ignores that per-capita impacts fall with prosperity and technology (e.g., the environmental Kuznets curve).

  
  

In summary, the article presents a naturalistic, scarcity-driven model that treats humans like any other species in ecological overshoot. Biblical truth counters this with a Creator who declares the earth “full” with “enough and to spare,” commanding His image-bearers to multiply, fill, subdue, and steward it responsibly. Science affirms the latter: human creativity under dominion has repeatedly expanded what the earth can sustainably support, fulfilling rather than contradicting God’s promises. True sustainability flows from obedience to the Creator, not fear-driven population limits.