Final answer:
Rousseau's ideas were controversial and revolutionary because he challenged the political establishment, advocated for a separation of powers, and supported overthrowing corrupt leaders.
Step-by-step explanation:
Rousseau's ideas were controversial and revolutionary for his time because he challenged the existing political establishment and advocated for a separation of powers in government, which aimed to prevent monarchs from having absolute authority. However, it is important to note that Rousseau did not want to kill all monarchs, but rather to limit their power. Additionally, he supported the idea of overthrowing corrupt leaders and giving power to the people. These ideas were radical at the time and sparked debates about the role of government and the rights of individuals.
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