A controversial mathematical model known as the Doomsday Argument has reignited debate in the scientific community by suggesting that humanity has a survival limit with 95% statistical certainty. According to this approach, our civilization could disappear within 17,100 years.
The Copernican Principle and the Doomsday Argument
The analysis, discussed in an article by Scientific American, is based on the Copernican Principle. This principle holds that humans do not occupy a special place in the universe, meaning our current presence is simply a random event in time.
Following this logic, any individual alive today would be considered as a randomly chosen being within the extensive human chronology. This challenges the notion that our society is in an early or privileged stage of its development.
To support these predictions, scientists consider a historical figure of approximately 117 billion people who have lived so far. Basing their calculations on this statistic, the model attempts to determine how many people will still be born, using a probabilistic approach.
The algorithm postulates that with a 95% probability, existing humans represent at least 5% of the total population that will inhabit the Earth. Since the theoretical total is twenty times greater than this percentage, experts multiply this historical base to set a demographic ceiling.
This calculation suggests that the planet could host a maximum of 2.34 trillion people throughout its history. Following the current birth rate, this limit would be reached within 17,100 years.
Proponents of this theory claim that this number represents a maximum limit before an inevitable extinction occurs. Factors that could trigger this end include climate collapses, nuclear wars, global pandemics, or technological dangers.
Controversies and Environmental Risks
Despite its mathematical foundations, this model has been criticized by the global scientific community. Many experts argue that the model’s assumptions are too simplistic, ignoring technological and social variables that could change the future.
Specialists point out that advances such as the colonization of other planets or significant increases in life expectancy could quickly invalidate the algorithm’s bases, allowing humanity’s expansion for millions of years.
Alternatively, studies like those conducted by the University of Milan warn of scenarios where severe environmental crises could limit the Earth’s carrying capacity. A reduction to 2 billion people could cause a dramatic population decline, halving the population by the year 2064.
This study underscores the vulnerability of population dynamics to abrupt environmental changes, beyond statistics.
