While possessing a common characteristic in content, constitutions differ greatly in type. Some writers classify them into cumulative or evolved, and conventional or enacted.
A cumulative or evolved constitution is the result of slowly working evolutionary changes.
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The product of accumulated material which has molded and shaped the political institutions of a country such a constitution is not made it grows with its roots in the primitive past.
The edifice it presents is the accumulated wisdom of the past and the result of numerous customs, usages, traditions, principles, judicial decisions which have influenced its development. The conventional or enacted constitution, on the other hand, is the result of the deliberate efforts of man.
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It is consciously made and either may be the outcome of the deliberations of a Constituent Assembly specially convened for that purpose, or it may have been promulgated by the command of the sovereign authority, King or Parliament. The prescriptions of an enacted constitution are embodied in a document or a series of documents.
Constitutions are now divided, for brevity and definiteness; into written and unwritten; although the distinction between them is more or less the same as is between evolved and enacted constitutions.