The United States has a single foundation: The Constitution. It outlines our legally shared values:
We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America.
Any appeal to principles not contained herein are not shared values. For example, we are not a biblical nation. We are a Constitutional nation. Argumentation of law must only appeal to legally shared values.
During each political season, we are inundated with campaign slogans and rhetoric which appeal to foundational American values. We hear reference to our being a Judeo-Christian nation, appeals to biblical authority, nostalgic recounting of the founding fathers’ personal beliefs, or even the eulogizing of small-town American values. The values of some Americans are identified as real, while others are demonized as un-American.
From this basis of branding values, many attempt to both discredit the ideas of others and to lend authority to their own. Their position is necessary, they’ll argue, given the core values they’ve defined.
The problem? Frequently these defined foundational values are not legitimately shared. Agreeing to a shared set of values is fundamental to any productive argument. Discussion of a topic, absent agreement on the foundational values, is most often pointless.
Imagine a bicycle built for two; if the riders don’t agree on the purpose or direction of travel, their odds of arriving at a mutually acceptable place is unlikely. If one rider attempts to define his own values as universal, in this example by seizing the front seat of the bicycle, they’ll simply be imposing their non-shared value on the other. Their values, then, are no longer shared, they’re authoritarian; one party attempting to force their values on the other.