A significant and lasting shift in the dominant political parties or coalitions within a political system. This involves a substantial change in the electorate’s partisan attachments, often triggered by critical elections or historical events. For example, the election of 1932, during the Great Depression, saw a large-scale shift of voters towards the Democratic Party, establishing a new dominant coalition under Franklin D. Roosevelt.
Such a transformation is crucial because it alters the balance of power, influences policy agendas, and reshapes the political landscape for extended periods. Understanding these shifts allows observers to anticipate potential policy changes and comprehend the evolving nature of political ideologies. Historically, these critical realignments have coincided with periods of significant social and economic upheaval, representing a fundamental change in the electorate’s priorities and values.