Some describe the current political circumstances in the United States as highly polarized. I would argue that we are living in highly unpolarized times, in fact. In a two party system, the most balanced circumstances that can arrive are those where the two parties appeal to half of the population. A fifty-fifty divide. While the distribution of powers among the three branches of federal government as well as on the state and local levels can result in various manifestations of this fifty-fifty distribution, the will of the people as a whole will reach a certain stasis. Contrast this with a ratio of 2-1. Let us imagine that 66% of the population support one party, while 33% support the other. This, in my opinion, would create the most polarized political environment. In the U.S., with roughly 300 million people, imagine 200 million members of one party and 100 million of the other. It seems to me, this would "cause to concentrate about two conflicting or contrasting positions" because the subsequent imbalance of political power would energize both parties to further entrench in their view.
While the U.S. today exhibits a viscious, unforgiving political environment, this is in fact a separate issue from "polarity." A political system can be at once viscious and balanced.