The term 'labor forces' can refer to a variety of different groups, but in this context it is referring to unions. Unions are organizations that represent the collective interests of workers in a particular industry or sector. They are responsible for negotiating wages, benefits, and working conditions with employers on behalf of their members. Unions also provide support and resources to their members, such as legal advice and job training. Unions have been an important part of the labor movement since the 19th century, and continue to play a vital role in protecting the rights of workers today.