Over the past few months, the United States has seemingly entered a new era for American unions. After decades of decline, major American unions — including the Teamsters, the United Automobile Workers, and the Writers Guild of America, and the Screen Actors Guild — have taken militant stances in contract negotiations. Thus far, two have chalked up considerable victories. This week, workers at Kaiser Permanente walked off the job in the largest strike of health care workers in U.S. history. All at once, it seems union power is on the rise again.