Final answer:
Service jobs have seen dramatic growth in the later 20th century, marking a shift to a service-based economy and the rise of the information age. While manufacturing jobs declined after peaking in the 1970s, government jobs increased slightly until 1990 and then decreased.
Step-by-step explanation:
In the later 20th century, there has been a dramatic increase in service jobs. This growth is indicative of a transition from an industrial-based to a service-based economy. The proliferation of jobs in areas such as sales, advertising, insurance, communications, and more reflects the rise of the information age and a postindustrial service economy. Concurrently, jobs in manufacturing peaked in the late 1970s and have since declined significantly, by more than a third. Government jobs saw a modest increase up until 1990 but have been on a slight decline thereafter. This shift has had wide-reaching implications, leading to a diverse range of service job qualities and contributing to economic bifurcation and social challenges, such as a widening wealth gap.