Freedom of Speech?

Freedom of Speech: Do we really have that freedom? According to the 1st Amendment of our Constitution we do but according to the court system and a majority of society, we don't!
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According to the USC:
AMENDMENT I

Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances. (Cornell Law, http://www.law.cornell.edu/constitution/first_amendment)
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According to the Supreme Court:
Freedom of speech in the United States is protected by the First Amendment to the United States Constitution and by many state constitutions and state and federal laws. The freedom is not absolute; the Supreme Court of the United States has recognized several categories of speech that are excluded from the freedom of speech, and it has recognized that governments may enact reasonable time, place, or manner restrictions on speech. (Wiki http://en.wikipedia.org/wiki/Freedom_of_speech_in_the_United_States)

But, The Supreme Court never ruled on the constitutionality of any federal law regarding the Free Speech Clause until the 20th century. (Wiki http://en.wikipedia.org/wiki/First_Amendment_to_the_United_States_Constitution)
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Why did they decide to overrule a right we were obligated to have all of a sudden?
What was the change due to?
Who exactly were those rights intended for then?

I leave loopholes in my arguments for those thinkers to add on, but like a friend of mine recently brought up, back up your arguments with research and lets educate one another rather than fight over something we may not really have the RIGHT to fight over in the first place.

I would like to continue this discussion drop a comment.