After the signing of the Treaty of Paris, the balance of power in North America changed a lot. Before the treaty, there was only one hegemonic power in North America: Britain, with only a few remaining areas dominated by Spain and France.
After the Treaty was signed, Britain lost its most populated and developed colonies, and a new political actor, the United States, emerged.
Since they are not legally allowed to have alchol they are not willing to call a cab, friend, sibling, or parent to pick them up because the do not want to get in trouble. In addition, at this age they are more reckless.
