The document discusses estimating the maximum human lifespan based on a 2016 study. The study found that while average lifespans have increased significantly since 1800, the age of the oldest person has not risen in nearly 30 years, suggesting a natural limit. Analyzing the ages of the oldest men and women ever, who lived from 1870 to 1903, the study concluded their lifespans of around 115-119 years may be near the maximum natural limit.

1. Estimating the Maximum Human Lifespan
The Next Paradigm Shift

2. Introduction
An invitation-only platform, The Next Paradigm Shift, Inc., promotes
knowledge regarding natural health and the prevention of various chronic
conditions. Natural health professionals and longevity researchers at The
Next Paradigm Shift are exploring a variety of subjects, including matters of
extending life expectancy and reversing ageing.

3. A 2016 study published in the journal Nature explored the maximum lifespan
of humans. The study began by examining the technological progress that has
allowed human life expectancy to grow significantly since the 1800s. In 2020,
the average human lifespan of an American was 78.93 years, compared to an
average lifespan of between 30 and 40 years for humans in 1800.

4. Despite this considerable increase in life expectancy, researchers the Nature
study noted that the age at death of the world’s oldest person had not
noticeably increased in nearly three decades. Building off of this fact, the team
determined that the impact of relevant health improvements typically decline
after the age of 100 and that the maximum human lifespan is a fixed value
that cannot go beyond naturally imposed constraints.

5. The average age of the five oldest women ever have lived is about 119 years,
while the five oldest men have an average lifespan of about 115 years. The
birth dates for these individuals range from 1870 to 1903, suggesting these
ages may be near or at the natural limit of the human lifespan.