 The comprehensive campaign is an evolution of labor union tactics, a process which has been ongoing in the United States since the 1960s.The identification of "good organizing practices," which arose out of a wave of labor union organizing in the 1930s and 1940s, was no longer proving effective for a variety of reasons (innovations in union-avoidance and anti-union tactics, economic and cultural changes, statutory and case law alterations in federal labor protections, etc.