A person who advocates for or believes in alternation, particularly in historical or political contexts; someone who practices alternation in rotation of duties or representation.
From 'alternation' plus the suffix '-ist,' meaning a person who practices or advocates for something.
Some radical Enlightenment thinkers were alternationist in governance, proposing that leadership should literally rotate among citizens—an idea ahead of its time that foreshadowed modern concepts like term limits and democratic rotation.
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