It is your legal right to organize a union at work. The WGAE takes that right very seriously and stands with employees to see that they are protected when they organize. You can read about your legal right to form a union on the National Labor Relations Board website. 

Beyond the legal protection from any kind of company retaliation, the union is a way to ensure you have job protection through the solidarity and strength of your coworkers. When hundreds of people come together and support one another through a union, it protects you from bad or retaliatory management behavior. No one individual can be singled out. This is not the case in a non-union work environment.