The claim that the white population was 36% of the world in 1900 and is now 8% is not supported by reliable demographic data and appears to be an oversimplification or misinterpretation of complex population statistics.
In 1900 white population of world was 36%, today it is 8%.

World population - Wikipedia
Source: en.wikipedia.org
Key Evidence
Europe accounted for about 25% of the world population (~400 million) in 1900, but total global white population including other regions was likely somewhat higher but below 36%.
brainly.inbrainly.inWhat percentage of the world's population is white?
en.wikipedia.orgen.wikipedia.orgList of countries by population in 1900
Current estimates place the global white population at roughly 7-10%, consistent with the '8%' figure cited.
x.comx.comRadioGenoa on X: "In 1900 white population of world was 33%, today it is 7%." /...
quora.comquora.comWhat percentage of the world population is of white European descent?
World population growth has been concentrated outside traditionally white-majority regions, affecting relative percentages.
worldometers.infoworldometers.infoWorld Population by Year
en.wikipedia.orgen.wikipedia.orgEstimates of historical world population+1 more
What the Evidence Shows
Historical estimates of the global white population around 1900 vary, but credible sources do not confirm a figure as high as 36%. Some informal or social media claims suggest figures around 30-35%, but these lack rigorous demographic backing.x.comx.comRadioGenoa on X: "In 1900 white population of world was 33%, today it is 7%." /...
quora.comquora.comHow did white people go from being 35% of the world population 100 years ago to...
The global population in 1900 was approximately 1.6 billion, with Europe (predominantly white) accounting for roughly 25% of that total (~400 million), but this does not include white populations in other regions such as North America, Australia, and parts of South America. Thus, the total white population percentage would be somewhat higher than just Europe's share but likely below the claimed 36%.brainly.inbrainly.inWhat percentage of the world's population is white?
en.wikipedia.orgen.wikipedia.orgList of countries by population in 1900
Current estimates of the global white population vary depending on definitions and geographic scope. Estimates often place it between 7-10% of the current world population (~8 billion), which aligns roughly with the 'today it is 8%' part of the claim.quora.comquora.comWhat percentage of the world population is of white European descent?+1 more
The decline in percentage is influenced by faster population growth rates in non-white regions rather than a decline in absolute numbers of white people globally. The world population has grown significantly since 1900, especially in Asia and Africa.worldometers.infoworldometers.infoWorld Population by Year
en.wikipedia.orgen.wikipedia.orgEstimates of historical world population+1 more
The claim simplifies complex demographic trends and racial/ethnic categorizations that vary by source and methodology. There is no authoritative global census or demographic study that definitively supports the exact percentages stated.
Some sources discussing this topic are social media posts or opinion-based platforms (e.g., Quora, X/Twitter), which are less reliable for precise demographic data.x.comx.comRadioGenoa on X: "In 1900 white population of world was 33%, today it is 7%." /...
quora.comquora.comHow did white people go from being 35% of the world population 100 years ago to...
In summary, while it is broadly true that the proportion of people identified as white globally has decreased as a percentage due to differential growth rates worldwide, the specific figures "36% in 1900" and "8% today" are not well-supported by authoritative demographic data and should be treated cautiously.