People drink so much alcohol because of themselves as well as others. People sometimes get drunken when they are depressed. Perhaps many people agree that alcohol could comfort and sympathize with them like a good friend. In the mean time, people often drink for social life as well. Some of them want their friends to drink as much as they do even if the friends do not feel like it. And the friends do not want to or are not able to ignore the peer pressure, either. Plus, others want to enjoy cheerful atmosphere at parties, or they have to drink because they are at the parties.