Incognito and Martin (Lynne Sladky/AP)
In the play Othello, Iago sets up Michael Cassio by forcing him to drink. Cassio in an alcoholic and he was trying to stay away from drinking, so that he wouldn't get drunk and be reckless. Iago continued to try to get Cassio to take a drink, and he eventually did. Cassio became drunk and it inhibited him, and he eventually fought Montano, and killed him, and that murder got him fired from his job as Lieutenant.