Throughout the history of the human experience, several key periods were crucial to the dissemination of philosophies, ideas, and culture throughout various nations and societies.
It can be argued strongly that progress, both social and technological, is dependent upon this exchange.
One such crucial moment in our recent past which has most fundamentally impacted our everyday lives is the Enlightenment, also referred to as the Age of Reason.
It was during this period (c.a. 1715-1800) that the world experienced many revolutionary ideas, some quite literal.
The basis for this perception-altering thinking was in itself the reason it simultaneously appealed to so many and was met with such resistance by others: academics and philosophers began to ascribe authority to reason and logic as opposed to a
caste-like aristocratic tradition and religious dogma.
Among the myriad of thinkers, inventors, scientists and statesmen that took part in this movement, few things have affected the lives of so many as the principles championed by English philosopher and physician John Locke.

A painting of John Locke, a man who revolutionized the democratic government.
One foundation of Locke's philosophies was the idea of
tabula rasa, which roughly translates into English as "blank slate."
This idea, while not unique to Locke, was brought to the forefront of mainstream consciousness by his work
An Essay Concerning Human Understanding.
This concept describes the human psyche as blank at birth, freeing each person to determine their own personality, morality, and value by their individual experiences and actions.
This epistemological view was in contrast to the belief in an inherent human nature, which many believed was attributed to heredity, race, gender, and so on.
This has most notably been an influence in modern thinking in the fields of social sciences such as
psychology.
Beginning around the turn of the century, we began to view the idea that genes determined personality characteristics as "racist," or "sexist."
This view has its roots in the belief that all humans posses
tabula rasa at birth - a fact which attributes Lockean philosophies to the roots of the Civil Rights Movement, women's suffrage, and countless other human rights events in recent history.
Locke influenced the founding fathers while drafting the Constitution.
A consequence of Locke's firm belief in our all being given this "blank slate" at birth was that, logically, we were all born equal.
This led Locke to develop the concept of
natural rights, rights which he believed were possessed by every person and could not be invalidated or surrendered by social or legal contract.
Locke originally conceived of these rights as "life, liberty, and estate," but many are familiar with our American adaptation: "Life, liberty, and the pursuit of happiness."
This idea was quickly adopted by such revolutionaries as Francis Hutcheson, Voltaire, and Thomas Jefferson.
It was upon the claim of violations of these rights that the Atlantic Revolutions were founded, which included the American, French, and Latin-American Revolutions.
Even today, the recent
democratic revolutions in Tunisia and Egypt are built on the popular uprisings and demand of freedom from the oppression of these rights.
Locke also derived from every person's right to liberty the liberty of their own conscience - which led to his advocacy of the
separation of church and state.
This concept also was adapted by nearly all subsequent democratic revolutions, and is likewise the cornerstone upon which many recent revolutionary skirmishes rest.

It was Locke's ideas that inspired revolutions, such as those in France (below) and America (right), in order to gain more rights for the people.
These are just a few of the contributions John Locke made to our modern society. Locke brought into focus many of the ideals and principles we take for granted today. Every citizen of every 1st-world nation has felt, even vicariously, the effects of his influence. He is truly one of the most important figures of the Enlightenment.