Final answer:
Enlightenment ideas during the 1700s spread through the writing and thought leadership of philosophers, the practical application in North American colonies, and the international influences exemplified by the French Revolution.
Step-by-step explanation:
Three ways that Enlightenment ideas spread during the 1700s include the role of philosophers, the experiences in colonial North America, and examples from other nations.
Enlightenment philosophers such as John Locke, Voltaire, and Rousseau disseminated new thinking about government, rights, and human potential through their writings, which were read widely across Europe and the American colonies.
The colonial experiences in North America provided a practical context where Enlightenment ideals could be tested and implemented, significantly influencing the lead-up to the American Revolutionary War.
International engagement, including the impact of the French philosophers in the salons and the eventual French Revolution, demonstrated the power of these ideas beyond their borders, setting an example for other nations to follow.
These dynamics helped to foster a revolutionary spirit abroad and inspired the founding principles of new governments, notably in the creation of the Declaration of Independence and the Constitution in the United States.