The problem is, its terra incognita. We just don't know.
Let's assume that Agriculture is synonymous with civilization. Well, not quite, but it's a necessary step, and let's see it's usually or often the first step, or very very close.
Agriculture appears to have been independently invented in:
* Papua-New Guineau;
* Southeast Asia, probably the Yellow or Yangtze river;
* Mesopotamia;
* Egypt;
* The Indus Valley;
* The Sahel;
* West Africa;
* The Ethiopian Highlands;
* The Andes
* Meso-America;
* Eastern Woodlands;
There may be arguments. Mesopotamia and Egypt are generally grouped together in the 'fertile crescent' which includes Anatolia and Pakistan.
There may be other candidates for independent invention, recognized or unrecognized.
But they all have several things in common. They all took place an unbelievably long time ago. I think that the most recent was no earler than 4000 years ago, the oldest may go back 10,000 years. They were all the products of pre-literate societies. The original societies are long gone, and even the sites of original cultivation are gone or buried under a hundred generations.
So basically, we're reduced to guessing as to what happened, how it happens, why it works or doesn't work, why one society develops it, why some plants get domesticated. There's a lot of good theory, and some gaping holes.
So, theory.
Let's assume that Agriculture is synonymous with civilization. Well, not quite, but it's a necessary step, and let's see it's usually or often the first step, or very very close.
Agriculture appears to have been independently invented in:
* Papua-New Guineau;
* Southeast Asia, probably the Yellow or Yangtze river;
* Mesopotamia;
* Egypt;
* The Indus Valley;
* The Sahel;
* West Africa;
* The Ethiopian Highlands;
* The Andes
* Meso-America;
* Eastern Woodlands;
There may be arguments. Mesopotamia and Egypt are generally grouped together in the 'fertile crescent' which includes Anatolia and Pakistan.
There may be other candidates for independent invention, recognized or unrecognized.
But they all have several things in common. They all took place an unbelievably long time ago. I think that the most recent was no earler than 4000 years ago, the oldest may go back 10,000 years. They were all the products of pre-literate societies. The original societies are long gone, and even the sites of original cultivation are gone or buried under a hundred generations.
So basically, we're reduced to guessing as to what happened, how it happens, why it works or doesn't work, why one society develops it, why some plants get domesticated. There's a lot of good theory, and some gaping holes.
So, theory.