Why are India and China so populated?

When we talk about population, or more precisely overpopulation, the very first thing that might come in our mind, is the great country of China, and India. Both countries make almost 38% of the world population. That means every 2 of the 5 people on this earth, is either an Indian or a Chinese. But, have you ever wondered, why is this so? Is it because of the area, of these two gigantic countries? Or, as it is well known, that every civilization settles near a water supply, so, maybe, these two have the world's largest freshwater supply. Or, there is also a possibility that these two have no other work to do, and they just love to reproduce. So, let’s talk about every possible factor, in our new episode, of Stats to Analyse.

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[theinfotainer]

India's population in the year 1AD was somewhere around 75M and China's around 60M
With simple math we can say that their population has grown roughly 20x over *2000 years!!*
US population grew that much within the last 300 years itself

[DataWatch.]

Interesting that Canada and Russia have such land area. Problem is much of it is pretty inhabitable

[StatstoAnalyse]

We also wanted to include the points of geographical advantage, but we are advised to keep videos short and simple. So, what do you guys think? Should we make 15+ minute videos as well?

[可乐加糖]

Dont forget chinese that live in usa, malaysia, taiwan, hong kong, indonesia

[pruer]

Trillionaires? of what? sand on a beach? on credit? Please. Someone counted that far with their fingers or used an abacus without calculations to reach in that level is ABSURD and not even mentioning HOW is lazy.
NOTHING compares to the prosperity of the United States in less than 300 years. China never prospered nor India in that way and remain one of the most polluted and impoverished till this day. Overpopulation demands it. Why can't too much people having babies not feasible? HOW did they prosper? Where is the mighty power of deductive reasoning? Poor countries have in a strange way, overpopulate while rich countries don't. You would think rich countries would go all out on babies since they can afford to support them but IT JUST ISN'T SO.
Your stats is infused with a narrative as if THAT'S the only conclusion or credible models. The "About" section states numbers can give numerous interpretations which are not necessarily credible nor validated. "Never left" isn't good enough.