# Was the earth once home to billions—and then did humanity decline? **URL:** \ **Category:** General\ **Created:** [September 7, 2026, 4:13pm UTC](https://community.worldhistory.org/t/was-the-earth-once-home-to-billions-and-then-did-humanity-decline/19130 "2026-09-07T16:13:45Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![bibekjaiswal](https://avatars.discourse-cdn.com/v4/letter/b/f6c823/32.png) [@bibekjaiswal](https://community.worldhistory.org/u/bibekjaiswal)\ **Post date:** [September 7, 2026, 4:13pm UTC](https://community.worldhistory.org/t/was-the-earth-once-home-to-billions-and-then-did-humanity-decline/19130/1 "2026-09-07T16:13:46Z")
Could there have been an ancient period when Earth was already packed with billions of people, and then the population declined?" ---
**Author:** ![tinkwelborn](https://yyz2.discourse-cdn.com/flex034/user_avatar/community.worldhistory.org/tinkwelborn/32/212_2.png) [@tinkwelborn](https://community.worldhistory.org/u/tinkwelborn)\ **Post date:** [September 8, 2026, 12:36am UTC](https://community.worldhistory.org/t/was-the-earth-once-home-to-billions-and-then-did-humanity-decline/19130/2 "2026-09-08T00:36:14Z")
As per Google/AI, Earth’s human population is approximately 8.3 billion today, growing from an estimated 1 million people 10,000 years ago. Key Population Milestones • 100,000 BCE – 10,000 BCE: The global population stayed under 1 million while humans lived as hunter-gatherers. • 1 CE: The population reached roughly 170 million after the rise of farming. • 1400: Numbers dipped slightly or grew slowly to around 350 to 400 million, impacted by events like the Bubonic Plague. • 1804: The world population hit 1 billion for the first time at the start of the Industrial Revolution. • 1927: Reached 2 billion in roughly 123 years. • 1960: Reached 3 billion in just 33 years. • 1974: Reached 4 billion. • 1999: Reached 6 billion. • 2011: Reached 7 billion. • 2022: Exceeded 8 billion according to the United Nations World Population Prospects. Thus stated, around 74,000 years ago there was a huge volcanic eruption: the Toba eruption. The eruption lasted perhaps 9 to 14 days, which caused a severe global volcanic winter of six to ten years and contributed to a 1,000-year-long cooling episode, resulting in a genetic bottleneck in humans. It nearly ended humankind life, leaving only a few thousand remaining. So, it is HIGHLY unlikely that “billions” of humankind existed in the past. ---
**Author:** ![ahmed.bwb](https://avatars.discourse-cdn.com/v4/letter/a/eb9ed0/32.png) [@ahmed.bwb](https://community.worldhistory.org/u/ahmed.bwb)\ **Post date:** [September 8, 2026, 11:39am UTC](https://community.worldhistory.org/t/was-the-earth-once-home-to-billions-and-then-did-humanity-decline/19130/3 "2026-09-08T11:39:18Z")
According to recent studies, humanity was on the verge of extinction 8 million years BC. ---
**Author:** ![tinkwelborn](https://yyz2.discourse-cdn.com/flex034/user_avatar/community.worldhistory.org/tinkwelborn/32/212_2.png) [@tinkwelborn](https://community.worldhistory.org/u/tinkwelborn)\ **Post date:** [September 8, 2026, 2:06pm UTC](https://community.worldhistory.org/t/was-the-earth-once-home-to-billions-and-then-did-humanity-decline/19130/4 "2026-09-08T14:06:02Z")
Ah, yes; an earlier event: a study recently reported at the journal _Science_ [[https://www.science.org/doi/10.1126/science.abq7487](https://www.science.org/doi/10.1126/science.abq7487) ] A groundbreaking genetic study published in the journal _Science_ revealed that around **930,000 to 813,000 years ago** , our direct human ancestors suffered a catastrophic population crash. **The 900,000-Year Bottleneck** According to the genomic data analyzed from modern populations, **nearly 98.7% of the breeding human ancestor population was wiped out** at the start of this severe “bottleneck”. - **The Population:** The global breeding population plummeted to a mere **1,280 individuals**. - **The Duration:** This tiny group of survivors kept humanity on the brink of extinction for roughly **117,000 years**. - **The Cause:** Researchers attribute the crash to a drastic global climate shift, during which the planet became significantly colder and drier, triggering prolonged droughts and destroying primary food sources. [ ---
**Author:** ![jvdc](https://yyz2.discourse-cdn.com/flex034/user_avatar/community.worldhistory.org/jvdc/32/28_2.png) [@jvdc](https://community.worldhistory.org/u/jvdc)\ **Post date:** [September 8, 2026, 2:18pm UTC](https://community.worldhistory.org/t/was-the-earth-once-home-to-billions-and-then-did-humanity-decline/19130/5 "2026-09-08T14:18:36Z")
Very interesting! I had heard about this but I wasn’t aware that it’s down to only 1280 individuals! That’s insane. On a similar note, did you know that all modern cows are descended from a single herd of proto-cattle? Mindblowing. ---
**Author:** ![tinkwelborn](https://yyz2.discourse-cdn.com/flex034/user_avatar/community.worldhistory.org/tinkwelborn/32/212_2.png) [@tinkwelborn](https://community.worldhistory.org/u/tinkwelborn)\ **Post date:** [September 8, 2026, 2:36pm UTC](https://community.worldhistory.org/t/was-the-earth-once-home-to-billions-and-then-did-humanity-decline/19130/6 "2026-09-08T14:36:31Z")
Wow. Yeah. Don’t tell anyone else, we don’t want to ruin their party; but, we’re very, very ‘lucky’ to be here. Marvin Welborn [tinkwelborn@mac.com](mailto:tinkwelborn@mac.com) > **[Tink's ChapBlog ~ Tales of the Tribe. Mythopoeic Verse](https://tinkwelborn.com/)** > > Copyright © 2011 Marvin Loyd Welborn. All Rights Reserved. > **[Tink's ChapBlog ~ Tales of the Tribe. Mythopoeic Verse](https://tinkwelborn.com)** > > Copyright © 2011 Marvin Loyd Welborn. All Rights Reserved. Author of: Union Station, Paradigm Shift, and Tales of the Tribe.