Alcohol: Alcohol is one of the oldest and most widely used drugs in human history. It has been used for religious rituals, social gatherings, medicinal purposes, and recreational enjoyment. Alcohol has also influenced art, literature, music, politics, and warfare. However, alcohol has also caused many problems, such as addiction, violence, crime, accidents, diseases, and deaths. According to the World Health Organization, alcohol is responsible for more than 3 million deaths per year worldwide.