What is a period in Europe history with many educated people stress the importance of learning and reasoning education was considered the key to understanding the problem?

The period you are referring to is the Enlightenment, which spanned the late 17th to the 18th century in Europe. During this time, intellectuals emphasized reason, science, and individualism, advocating for education as a means to address societal issues and improve human existence. Key figures such as Voltaire, Rousseau, and Kant championed the use of reason to challenge traditional authority and promote knowledge. This era laid the groundwork for modern democratic thought and the value of education in fostering critical thinking and progress.