Why has our government become so divided since 1968

The United States of America is as divided as it has been for at least 100 years. The two major parties disagree on if certain problems even exist, and most voters vote not in support of their candidate, but in opposition to the opposing one. It can seem like the regions of the country are truly differing nations.

But why is this? Why do we disagree on such fundamental issues now?

According to author Colin Woodard, it is because Americans never did agree on fundamental issues, and North America is really comprised of 11 distinct cultural regions which battle for political and social supremacy constantly.

The differences in the regions, he argues are not only cultural and political, but also linguistic, religious, and even show up in what holidays are celebrated: with some nations celebrating Martin Luther King Jr day, and others celebrating Robert E Lee’s birthday.

Should we return America to concern for the common good? Or return to rugged individualism? Are we one nation under the one true God? Or is there strength in our diversity? Different regions suggest different answers, and view each as the "true" American values system.

The idea of the United States being a union of cultural regions is not a new one, the idea has existed in some form for decades, but Woodard’s model is the newest and perhaps most comprehensive. 

His division of the continent includes the following regions: A map is available here.

Yankeedom: Consisting of New England and the upper Midwest, this region was founded by radical Calvinists determined to build a city on a hill in the new world. This region is notable for the value it places on education, its acceptance of state regulation, a Utopian mindset, and citizen activism. Formerly quite religious, it is now dedicated to a “Secular Puritanism”.

The Midlands: Stretching from Pennsylvania to the plains, this region is the most typically “American” of them all. Founded by Quakers and populated by Germans at the time of the American Revolution. This region has been moderate, unconcerned with ethnic or ideological purity. The key swing region in national politics. 

New Netherland: The area in and around New York City, this region was founded by the Dutch as a money making venture. Interested more in trade then moral questions, this region finds itself more comfortable with diversity of all kinds then almost any other region. An economic powerhouse, it still tends to ally with the economic regulation minded Yankeedom.

the correct answer is history and tradition.

my cultural heritage consists of irish, german, native american, and others.