The first battles went against intolerance , which harassed the religious and scientific thought, and against censorship andthe print licenses . Elestudio follows the evolution of ideas and practice of freedom of speech through print of any kind in North America and Europe to explain the differences between rules on both sides of the Atlantic. The first constitutional recognition of this right are inthe First Enmiendadela American Constitution , adopted in 1791 , and the French Declaration of Rights of 1789. But political and judicial actually stayed away from these grand statements .

Based partially different conceptions of the American and European routes have converged freedom to parangonables based on ideas, in the second half of the twentieth century.

When this happened began to consider new challenges, the direct use of free speech on the street ( the speeches of hatred, xenophobic , anti-Semitic , conflicts over the use of religious symbols and habits ... ) , and the enormous revolution that is assuming , at all levels , traffic information and freedom of expression on the Internet .

The book contains an overwhelming information on the problems and has passionately studied the fundamentals and history of an essential for the preservation of democratic rights and freedom values ​​.