Final answer:
The rise of the gig economy and the decline of manufacturing jobs have impacted the relevance of labor unions. The shift to service industries, globalization, and workplace protection laws have all contributed to the decline in union membership.
Step-by-step explanation:
The changes in the economy, such as the rise of the gig economy and the decline of manufacturing jobs, have had a significant impact on the relevance of labor unions. One explanation for the decline in union membership is the shift from manufacturing to service industries. Unions were traditionally stronger in manufacturing, but as more jobs moved to the service sector, unions have struggled to organize workers in these industries.
Another factor is the force of globalization and increased competition from foreign producers. This has put pressure on American workers and made it more difficult for unions to negotiate better wages and working conditions.
Additionally, workplace protection laws have reduced the desire for unions. These laws provide some protections for workers, making them less reliant on unions for representation.