The conventional view is that the discovery of agriculture about 7000 years ago in N.Europe (as the last ice age came to an end) by concentrating the production of food in one place released man for other activities. It catalyzed the development of trading which led to the development of written records and mathematics.
On the other hand Bryan Sykes, in "Adam's Curse" (A book which charts the decline of the Y chromosome and forecasts its eventual demise [recent studies have refuted this] and has had mixed, and sometimes contradictory, reviews in Amazon) presents some interesting (I think) arguments that agriculture has had some more malign influences.
1) Nutritional status declined as the diet was then dominated by carbohydrates
2) More sedentary lifestyles led to decline in physical condition
3) Whereas the hunter gatherer lifestyle was compatible only with monogamy, a man could plant enough grain to support two or more families. Land therefore acquired value and strong, ruthless individuals could buy, extort or simply take land from weaker individuals. Ownership of land therefore became linked to wealth, power and fecundity. Women married to such men would have more children and women who were attracted by power increased as a proportion of the female population. Sexual selection therefore led to men who were increasingly aggressive and power seeking and women who tended to be attracted to such men (I realize that this is an over-simplification and exaggeration but it contains an idea which, if valid, accounts for the nature of the alpha-male and why they are nearly always promiscuous. Of course all men are not like this; some remain with a hunter-gatherer personality and others have elements of both. Women likewise, mutatis mutandis. It also accounts for the absence of drive for success in many women but not, interestingly, for male attitudes towards women).
From this we can break down the big question into smaller subsets:
a) Was this form of agriculture always inevitable or were there alternatives (at least theoretically)?
b) If there were alternatives what were/are they and what are their benefits and disadvantages?
c) Is Sykes right in his analysis and conclusions?
d) If not, why not?
e) Are there any reasons to believe that any of the alternative societies that might have evolved would have been an improvement on the one in which we now find ourselves?