Final answer:
The 'Pure and Simple Unionism' was a strategy synonymous with the American Federation of Labor (AFL), which focused on immediate worker improvements through collective bargaining and was founded by Samuel Gompers.
Step-by-step explanation:
The “Pure and Simple Unionism” approach was most identified with the American Federation of Labor (AFL).
This particular movement in labor was characterized by its focus on immediate improvements such as better wages and working conditions, rather than pursuing radical changes to the capitalist system.
The AFL, founded by Samuel Gompers in 1886, specifically catered to skilled workers, leaving unskilled workers and broader socialist ideals to other movements like those led by Eugene V. Debs.
The AFL's strategy revolved around collective bargaining and the use of strikes to secure better conditions for its members, setting it apart from other labor organizations that had more expansive and radical visions for societal change.