<span>how nearly perfect the government is</span>
I would say mostly economic factors: common currency, common market, wide-scale trade among the countries. If one country is hit, the others will also suffer: this brings in the feeling of solidarity.
other than that, European culture is actually quite unified, with many shared valued, such as universal health care and religious freedom, yet connection to Christianity.
She describe the cruelty in her famous novel Une Toms Cabin and thought it was terrible. She experienced and seen slavery because hecause her house was near a slave plantation
