The average academic essay should contain the introduction, body, and conclusion, making sure the body has more text than the introduction or conclusion, as it is the bodyof a text, and should make up for the majority of the essay itself. The introduction is basically the first impression to an essay and should have a hook to keep the reader engaged. The conclusion should sum up some of the body of text, and overall conclude the essay itself.
They were better off. Without the discovery of the uses of fire, mankind would not be here. Fire led to the rapid increase of newer, more advanced tech, such as a sword instead of a club.