This Act defines, as a part of our substantive law, the right of self-organization of employees in industry for the purpose of collective bargaining, and provides methods by which the Government can safeguard that legal right. It establishes a National Labor Relations Board to hear and determine cases in which it is charged that this legal right is abridged or denied, and to hold fair elections to ascertain who are the chosen representatives of employees.
A better relationship between labor and management is the high purpose of this Act. By assuring the employees the right of collective bargaining it fosters the development of the employment contract on a sound and equitable basis. By providing an orderly procedure for determining who is entitled to represent the employees, it aims to remove one of the chief causes of wasteful economic strife. By preventing practices which tend to destroy the independence of labor, it seeks, for every worker within its scope, that freedom of choice and action which is justly his.
The National Labor Relations Board will be an independent quasi-judicial body. It should be clearly understood that it will not act as mediator or conciliator in labor disputes. The function of mediation remains, under this Act, the duty of the Secretary of Labor and of the Conciliation Service of the Department of Labor. It is important that the judicial function and the mediation function should not be confused. Compromise, the essence of mediation, has no place in the interpretation and enforcement of the law.
This Act, defining rights, the enforcement of which is recognized by the Congress to be necessary as an act of both common justice and economic advance, must not be misinterpreted. It may eventually eliminate one major cause of labor disputes, but it will not stop all labor disputes. It does not cover all industry and labor, but is applicable only when violation of the legal right of independent self-organization would burden or obstruct interstate commerce. Accepted by management, labor and the public with a sense of sober responsibility and of willing cooperation, however, it should serve as an important step toward the achievement of just and peaceful labor relations in industry.
Franklin D. Roosevelt, Statement on Signing the National Labor Relations Act. Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/208893