Final answer:
The French Revolution had both intellectual and economic causes. The spread of Enlightenment ideas and the desire for political change were intellectual causes, while government overspending and the economic crisis contributed to the revolutionary unrest.
Step-by-step explanation:
The French Revolution had both intellectual and economic causes. The introduction of new concepts, such as popular sovereignty and the spread of ideas concerning natural and human rights, were intellectual causes. These ideas, influenced by the Enlightenment movement, inspired the people of France to question the power of the monarchy and demand political and social change. On the other hand, government overspending to fund the king's extravagant lifestyle and an economic crisis were economic causes. The financial burden placed on the lower classes, combined with poor harvests and rising food prices, created widespread anger and frustration, fueling the revolutionary fervor.