Answer :
It provided the intellectual spark for the American and French Revolutions was the most significant effect of the European enlightenment period.
What is enlightenment period?
The Enlightenment, sometimes known as the great "Age of Reason," was an era of rigorous scientific, political, and philosophical discourse that dominated European culture over the "long" 18th century, from the late 17th century until the end of the Napoleonic Wars in 1815.
The Enlightenment gave rise to three major ideas: skepticism, individualism, and reason. One person who upheld all three of these principles was the French philosopher Voltaire.
The Enlightenment opposed the excesses of the church, supported science as a reliable source of knowledge, and battled for human rights against oppression.
Thus, It provided the intellectual spark for the American and French Revolutions.
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It provided the intellectual spark for the American and French Revolutions.