The Hemisphere: Brazil's rulers have been taken aback by the millions of countrymen surging up against them, venting their fury. What we have here is a fresh example of why socialism fails. Up until now, a million Brazilians in the streets usually had something to do with a soccer match or, perhaps, a samba festival. This time, it wasn't about festivities. What started as a protest against a 9-cent fare hike on public transport fireballed into a gigantic public protest against political corruption, high taxes and lousy public services — and the government itself. Protesters stormed state legislatures and set...