What were the pros and cons of farming for early human communities?

This excerpt is from 'A Retrieved Reformation' by O. Henry

Explanation:

When Jimmy Valentine was a criminal he had to hide from the world. He couldn't have any friends, and he had no prospects of marrying, even though he is described as exceptionally smart, good-looking, and likable. He becomes a changed man when he falls in love at first sight with Annabel Adams.'At the end of a year the situation of Mr. Ralph Spencer was this: he had won the respect of the community, his shoe-store was flourishing, and he and Annabel were engaged to be married in two weeks. Mr. Adams, the typical, plodding, country banker, approved of Spencer.'In the end, May inadvertently locks Agatha in the new safe, engaging the bolts and combination before Mr. Adams has had the chance to set them. Agatha is stuck in the vault, frightened and running out of air. The family begins to panic, imploring Jimmy to find a way to get her out.Then Jimmy greets Price warmly with a smile, stating, “Got around at last, have you? Well, let’s go. I don’t know that it makes much difference, now.” Ben begins to behave peculiarly and pretends not to recognize Jimmy. “Guess you’re mistaken, Mr. Spencer,” Price says, before turning and walking out of the bank.