Is disagreement inevitable in american society answer?

Probably, yes.

The historian and journalist Colin Woodward has posited that the United States is really just a collection of different countries with a variety of histories and shared cultural experiences. As a result of those different lived experiences and different cultural history (French v. Africa v. British v. Spanish v. Indigenous) we can't help but view the world differently.

answer; legislature;

the secretary of defense is the principal defense policy advisor to the president. under the direction of the president, the secretary exercises authority, direction, and control over the department of defense.

as you did not provide any choices for me to choose from to give you a direct answer, this is the only information i can provide.