What reasons led to the creation of estates in the medieval states of Europe? What were the functions of the English and French parliaments?

The reason for the creation of estates in the medieval states of Europe was the need for broad support in the struggle against large feudal lords from various estates (in England) and the support of the clergy, nobility and wealthy townspeople in the fight against the Pope (in France).
Functions of the English and French parliaments: At first, the parliament was convened to discuss taxes, but then began to participate in the adoption of laws.

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