The main difference between a constitutional monarchy and a constitutional democracy lies in the role of the head of state and the structure of governance:
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Constitutional Monarchy: In this system, a monarch (king or queen) serves as the ceremonial head of state within the boundaries of a constitution. The monarch's powers are usually limited by law or a parliamentary system, and there is often a separate body (like a parliament) that handles legislative functions. The monarch may have certain privileges, but the overall governance is conducted by elected officials.
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Constitutional Democracy: This system is characterized by a governing structure that is fundamentally based on democratic principles, where the head of state is typically an elected official (such as a president). The government is accountable to the people, and there are constitutional protections for individual rights and freedoms. In a constitutional democracy, the authority of the government is derived from the will of the people, and it emphasizes elected representation.
In summary, the key distinction is that a constitutional monarchy has a hereditary monarch as the head of state, whereas a constitutional democracy does not include a monarchy and usually involves an elected head of state.