What about the enlightenment period made it possible for john locke to be heard

The Age of Enlightenment was an intellectual movement in 18th century Europe. The goal of the enlightenment was to establish an authoritative ethics, aesthetics, and knowledge based on an "enlightened" rationality. The movements leaders viewed themselves as a courageous elite body of intellectuals who were leading the world towards progress, out of a long period of irrationality, superstition. The English philosopher and political theorist John Locke laid much of the groundwork for the Enlightenment and made central contribution. His political theory of government by the consent of the governed as a means to protect life, liberty and estate. His essay on religious tolerance provided an early model.

The correct answer to this open question is the following.

At the turn of the 20th century, the nations of Europe had been at peace with one another for nearly how many years?

The nations of Europe had been at peace with one another for nearly 100 years.

We are talking about the moment European nations signed the agreement during the Congress of Vienna in 1815, the so-called "Concert of Europe," until the beginning of World War I, in 1814, after the assassination of Archduke Franz Ferdinand, of the Austria-Hungary Empire.

One of the goals of the Congress of Vienna (1814-1815) was to restore Europe to the way it was before the French Revolution and Napoleonic Wars.