Feudalism: A medieval social system where land was exchanged for loyalty and military service between lords (nobles) and vassals (knights or peasants).
Enlightenment: An intellectual movement in Europe during the 17th-18th centuries that emphasized reason, science, individual rights & freedoms.
Industrial Revolution: A period of major industrialization in Europe during the 18th-19th centuries, marked by the rise of factories, urbanization, and significant technological advancements.