Are we one country? Another way of asking the question is "Are we more divided now than we were in the past? Are we less one country than we were in 1860 or 1896 or 1932 or 1968? If we survived those crises as a country (and some might say we didn't survive 1860 as one country), what divides us now that can't be overcome? Today, we expect to be all one thing or all another. The prarie farmer and Wall Street Banker of 1896 or 1932 probably hated each other, but recognized that they were part of one and the same nation in which both of them had a place. The Northern mechanic or merchant and Southern planter or farmer of 1860 more likely than not saw themselves as members of two different nations.
It does seem like today's divisions run higher than the usual city vs. country rivalry, but I don't think we're at anything near the degree of hostility felt in 1860. Especially since 9/11. Patriotism has a new, almost unprecedented popularity in the Blue zone, and, rightly or wrongly, "fundamentalism" has become a dirty word in much of the Red Zone.
In times of peace and prosperity, people take internal political divisions for great, unbridgeable chasms. When there are external enemies and real problems, people put these divisions aside and come together more. It's an encouraging sign that gun control seems to have fallen off the national agenda. The day will come when the crisis is resolved and we turn our energies against each other once again, but I don't long for that day.
Brook mentions he was almost finished with it before 9/11, and was a bit surprised that the attack didn't really make much difference to his conclusions. He says that 9/11 rallied people and neutralized the political/cultural leaders who tend to exploit differences. --- "Americans are in no mood for class struggle or a culture war."
Too bad we can't say the same about many on this forum.