| 1 | It's human nature, the author acknowledges, to want to be around people who are like ourselves. | |
| 2 | The broad instinctive mechanism upon which political edifices have to be built is one of cooperation within the herd and hostility towards other herds. | |
| 3 | Many people, in dozens of posted comments, worried that the attack reflected a growing intolerance of dissent. | |
| 4 | The battles waged by our troops are part of a broader struggle between two dramatically different systems. | |
| 5 | Let's resist the temptation to fall back on the same partisanship and pettiness and immaturity that has poisoned our politics for so long. |