A temporary alliance or union of distinct political parties for the purpose of forming a government or achieving a specific policy goal defines a political arrangement frequently observed in multi-party systems. This alliance occurs when no single party secures a majority of seats in a legislative body, compelling parties with shared interests to combine their resources to command a majority and effectively govern. For instance, in a parliamentary system, several smaller parties might join forces with a larger party to create a ruling majority, allowing them to pass legislation and control the executive branch.
The significance of these alliances lies in their ability to create stable governments in diverse political landscapes. They enable representation of a wider range of interests and perspectives in policy-making. Historically, such arrangements have been instrumental in shaping landmark legislation and navigating periods of political instability. However, maintaining cohesion within these alliances can be challenging, as parties may have conflicting priorities, potentially leading to internal friction and government instability.