Modern European identity has been forged in class struggles between the French revolution and fall of the Berlin Wall, which fell twice. Once, with the rest of the city in May 1945, when a national socialist alternative to a modernizing mix of parliamentary democracy and market economy crumbled...

"America is becoming a class-based society. It is now conventional wisdom to focus on the wealth of the top 1 percent-especially the top 0.01 percent-and how the ultra-rich are concentrating income and prosperity while incomes for most other Americans are stagnant. But the most important,...