What strategies did humans use to obtain food before the end of the last ice age? how did these strategies change during the neolithic revolution?

Prior to the Neolithic Revolution humans were nomadic hunter gathers. We moved around in search of food and often times followed animals. After the Neolithic Revolution humanity gained a green thumb so to speak and began to harvest plants and domesticate animals to survive. This allowed humans to specialize in certain trades as we had more time to do things and spent less time worrying about where our next meal is going to come from.

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