The colonists' desire to move westward
Correlation is not causation is my immediate reaction.
To be more in depth, this is a silly oversimplification that ignores increased use of drugs and the general problems that go along with the war on drugs.
<span>The greatest social shifts during this time in the
United States were caused by the Second Great Awakening, which was a
religious revival that sought in part to curb immigration. This of
course led to calls for prohibition, because it was believed that mostly
immigrants were the heavy drinkers. </span>