Answer:
Popular Sovereignty
Explanation:
The Progressive Era was a period of social activism and political reform in which many civilians participated (direct democracy) in order to reform the vertical (hierarchy) political system. Among the targets were the political machines with their corrupt and malfunctioning representatives.
Popular Sovereignty, that dates back to the Enlightenment, is the purest of (and most horizontal) democratic government, in the sense that the goverment´s purpose should be to protect (the civil rights) and serve the people, and not the other way around. And if they fail to do, or are corrupt or both, so they should be replaced.
Since 1990 the Japanese economy has slowed down. It is known as the lost decade, or lost Two Decades/ 20 years (initally people hoped it would be over after 10 years), where the GDP and real wages have dropped.
