No one knows—and science does not support naming a single successor. “Take over” might mean thriving around abandoned settlements, becoming ecologically influential, developing human-level intelligence, or building a technological civilization. Those are different outcomes, and each favors different traits and habitats. The most useful answer is therefore a set of possibilities, not a prediction that one animal will inherit the planet.
What “take over” could mean
A species could become more numerous in a particular place without dominating ecosystems worldwide. Ecological influence also differs from intelligence, and neither guarantees the ability to create technology or a civilization. Any proposed successor depends on which meaning—and what time horizon—you have in mind.
- Near-term opportunity: animals exploiting food, livestock, buildings, or other resources left behind by people.
- Ecological influence: species whose populations and interactions shape habitats and food webs.
- Long-term intelligence: animals whose traits might support increasingly complex problem-solving over evolutionary time.
- Technological civilization: a much more demanding prospect, requiring capabilities and environmental conditions that are not established by intelligence alone.
Could baboons benefit first?
BBC Science Focus presents baboons as a possible short-term beneficiary of abandoned human settlements: they might scavenge leftover food and livestock and increase in number in the immediate aftermath. That is a hypothetical scenario, not evidence that baboons would spread across the globe or become Earth’s dominant species. Its relevance would depend on where people disappeared, what resources remained, and which other species survived.
This is a local, near-term possibility—not an evolutionary transformation. Taking advantage of human leftovers would not by itself make baboons technologically advanced or ecologically dominant everywhere.
#1 Best Overall
Could octopuses become intelligent enough to build a civilization?
Futura reports that Oxford zoologist Tim Coulson proposed octopuses as one possible candidate for a future civilization-building species in his 2024 book The Universal History of Us. The idea draws on octopuses’ problem-solving, object manipulation, communication through color, and flexible behavior. These traits make the proposal worth considering, but it remains Coulson’s hypothesis rather than a consensus forecast or a prediction with an established probability. Futura’s account of the proposal discusses both its appeal and its limits.
The obstacles are substantial
Octopuses lack skeletons, and life on land would require major evolutionary changes. More broadly, a path from problem-solving to cities or technology is not inevitable: random mutations, extinction events, and population bottlenecks can alter evolution in unpredictable ways. No evidence establishes that octopuses are likely to build cities or reproduce human civilization.
Rank #2
- Used Book in Good Condition
Habitat also matters. Aquatic animals face major barriers to using fire and working metal, as BBC Science Focus notes. Even if an animal develops sophisticated intelligence, the physical conditions for familiar technologies may not be available to it.
Why there may be no replacement for humans
Evolution has no known destination that requires another species to become human-like. BBC Science Focus cautions that life does not need human-style intelligence to persist. Its author, zoologist-turned-educator Luis Villazon, puts the point this way: “For 99.9 per cent of the history of life on Earth, the planet has managed perfectly well without human-style intelligence and if we disappeared, there is no particular reason to suppose that anything would necessarily step up to take our place.” The figure is part of the article’s wording, not a measured probability about what would happen after human extinction. Read the BBC Science Focus discussion.
The Tool Desk
Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Rank #3
What happens to ecosystems would vary
Human extinction would not guarantee a quick, uniform recovery of nature. A scholarly review of animal declines describes cascading effects such as coextinctions and losses of ecological services. The consequences would depend on which species and ecological relationships were affected; the review is not a direct model of life after humans disappear. The review in Proceedings of the Royal Society B examines those broader ecological consequences.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to judge any proposed successor
Before deciding that a species could “take over,” separate the question into the factors that shape the scenario:
- Time horizon: Is the claim about scavenging resources soon after human disappearance, or about evolutionary change over thousands or millions of years?
- Habitat: Could the species thrive in the relevant land, freshwater, or ocean environments?
- Kind of dominance: Does “take over” mean abundance, ecological influence, intelligence, or technology?
- Traits and constraints: Consider diet, reproduction, social behavior, flexibility, range, and physical barriers to tool use or land adaptation.
- Cause and scope of extinction: The beneficiaries would depend on what caused humans to disappear and whether other life survived the event.
These questions are a way to compare possibilities, not a formal ranking. The available accounts do not quantify the odds of any species becoming a successor.
Quick Recap
Best Value
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
