You’re kidding right? There’s a reason the world is supporting ten times the population now than it had even a century or two ago.
Adaptation and innovation.
I’m not saying that famine isn’t a thing. It certainly is. But our ability to sustain population has increased to unimaginable levels in the past century.
What “moving on” have you seen in the past century?
“The past century”. Also known as 0.05% of the lifespan of humanity.
Permanent settlements, aka cities, have only existed for maybe 8% of humanity’s time on Earth.
Humanity survives, the culture does not. We’re spread out enough now that no one disaster will doom all of humanity, but our foolishness has killed numerous civilizations in the past. The Anasazi, the Indus Valley civilization, Rapa Nui, Olmecs, the Mayans, and Sumeria. Likely more who have been forgotten by time.
As Arnold Toynbee said “great civilizations are not murdered. They commit suicide.”
Malthusian collapse isn’t the only reasons civilizations collapse. But it’s a big one.
And the above is just talking food. It’s ignoring all the other scare resources that have driven wars and conflicts. We’re 30 years past Peak Oil and consumptions has only increased. To say nothing of the rare elements necassary for modern electronics.
During our time, humanity still managed to turn the cradle of civilization into desert through improper agriculture, and almost did it again to North America with poor farming techniques (see the Dirty Thirties/ Dustbowl). We adapted quick enough to recover from the latter but not the former.
Throughout all of human history, in general humanity adapts... but it also didn’t grow much. The world population was tiny for most of recorded history, barely using the potential resources of the planet. But even then, humanity continually moved and spread across the world.
Our population was fairly stable until the 1700 when it began to increase before shooting up in the 20th Century. From 2 billion to 6 billion in a century. It will be 8 billion by 2024.
We’ve gone past the period when poor resource management will doom a city state.