[Consort]

Chemical intoxicants have been available to humans in almost all cultures since the beginning of time.

We know that the history of man includes some horrific chapters right up to this day. What part, if any, do those "chemical intoxicants" play in human behavior? What would history have been like if human behavior was not altered by those substances?

[WindMinstrel]

what value is there in a "what if" discussion? The point is moot, no?

[philman_36]

What part, if any, do those "chemical intoxicants" play in human behavior? What would history have been like if human behavior was not altered by those substances?
How about you state what your opinions are on those subjects and then let the conversation progress?
Posing questions with such wide latitude, such as yours, isn't very productive IMO. It would necessitate another paper similar in scope to the one linked.
Some might call your questions rhetorical even.

[JediGirl]

What would history have been like if human behavior was not altered by those substances?

We wouldn't have any good music?