What term describes an arrangement where all employees must join the union as a condition of employment?

In the realm of labor relations, the term describing an arrangement where all employees must belong to a specific union as a prerequisite for employment is known as a closed shop. This type of agreement mandates that an employer will only hire individuals who are already members in good standing of the trade union, and these employees must maintain their union membership throughout their tenure. This creates a workforce entirely composed of union members, giving the union significant influence over hiring and employment within that particular workplace.

Historically, closed shops were a common feature of labor agreements in the United States, particularly gaining prominence in the 1930s. The National Labor Relations Act of 1935, also known as the Wagner Act, allowed employers and unions to negotiate these clauses into collective bargaining agreements, with unions seeing them as a vital tool for ensuring union security and a stable source of dues. However, the legal landscape dramatically shifted with the passage of the Taft-Hartley Act in 1947, which outlawed closed shop agreements in the United States, deeming them an unfair labor practice.

Despite being illegal in the U.S. since 1947, the concept of a closed shop provides a stark contrast to other union security agreements. For instance, a "union shop" allows an employer to hire non-union members, but requires new employees to join the union within a specified period after being hired to retain their job. While closed shops cannot be formally written into contracts in the U.S., some industries, such as construction and dock work, have historically operated with similar practical arrangements, often through union hiring halls, where union membership or payment of equivalent fees effectively becomes a condition for dispatching workers.