Study after study has come to the same conclusion: When workers come together in unions, they can help make things better for themselves, and indeed most Americans. Joining together enables workers to negotiate for higher wages and benefits, and when unions are strong, these benefits can spill over into other nonunion workplaces. Unions of working people also help ensure that government works for everyone—not just those at the top—by encouraging people of modest means to vote and by providing a crucial counterbalance to wealthy interest groups. Their ability to improve conditions in the workplace and in our democracy means that unions play a critical role in building the middle class.