Why the following historical terms are historical

I need a one to two pages essay of why the following historical themes are significant for my History class.

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After the Paleolithic Era which was characterized by the use of primitive stone tools and a nomadic lifestyle came the Neolithic Era. It was also known as the New Stone Age Era. This was when the human species started to form sedentary societies since they began to clear their lands for cultivation and animal husbandry.

(367 words)