Why do the world's most populated countries cluster where they do? We examine the geography driving global settlement.

Massive population density relies on specific environmental conditions. We analyze how rivers, fertile plains, and monsoon rains historically enabled nations like India and Pakistan to support hundreds of millions of residents.

Yet, these same geographic factors now face severe stress. By reviewing infrastructure development in countries like Russia, we see how environmental constraints dictate the limits of human expansion. This assessment reveals why some landscapes sustain massive growth while others reach a breaking point.

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