Are unions coming back?

Unions were a major economic force in the 20th century. Today, they are not. They seemed to be in the news constantly. Now, you seldom see an article about them in the media. But, maybe that will change. Finally, at Kickstarter United the workers have started the first union of full-time white collar employees at a major tech company. Also, it seems that workers across the industry have been ramping up organizing efforts over the past several years. For example, over 2,000 cafeteria workers at Google's Bay Area offices voted to join a union last December and Google contract workers in Pittsburgh voted to unionize last August, while Chicago employees of the food delivery service Instacart also unionized earlier this month.