First, I just wanted to note that it's not just the constitution (or Jefferson's letters, in which I believe he makes crystal clear) that addresses religion or lack thereof in the U.S. Have you ever heard of the Treaty of Tripoli? Only 10 years after our constitution was enacted, one of our founding fathers (John Adams) made it crystal clear in article 11 that we aren't a country founded on Christianity. It was ratified unanimously by the senate. Article 11 states:
"
As the Government of the United States of America is not, in any sense, founded on the Christian religion,—as it has in itself no character of enmity against the laws, religion, or tranquility, of Mussulmen,—and as the said States never entered into any war or act of hostility against any Mahometan nation, it is declared by the parties that no pretext arising from religious opinions shall ever produce an interruption of the harmony existing between the two countries."
http://rationalrevolution.net/articles/treatytripoli.htm
In addition, while many of our founding fathers were deeply spiritual, a good many of them were actually deists and actually despised Christianity and dogmatic aspects of any religion. Most people mistakenly think that we were founded as a Christian nation, but we weren't.
Also, @
aggie1983...how do you figure Atheism to be considered a religion? In no such way does it really qualify as a religion. In a VERY broad sense, you could say it's part of ones worldview, but that doesn't make it a religion. A religion adheres to certain beliefs based on things like faith, certain tenants to be followed, certain religious practices, etc. The "technical" definition of religion:
1.
a
set of beliefs concerning the
cause, nature, and purpose
of the universe, especially when considered as the creation of
a superhuman agency or agencies, usually involving
devotional and ritual observances, and
often containing a
moral code governing the
conduct of human affairs.
2.
a
specific fundamental set of beliefs and practices generally
agreed upon by a number of persons or sects: the Christian
religion; the Buddhist religion.
3.
the body of
persons adhering to a
particular set of beliefs
and practices: a world council of
religions.
4.
the life or
state of a
monk, nun, etc.: to enter
religion.
5.
the practice of
religious beliefs; ritual observance of
faith.
Again refer to my earlier statement about religion.
Also, your definitions and/or depictions of Atheism and Agnosticism are completely incorrect. Atheism is simple terms literally means lack of belief in a supreme being/beings. However, many Atheists tend to hold the position that if there was proof of a supreme being, they would not reject it. However, since no such proof exists yet, they continue to lack belief in a supreme and or supernatural being/beings. There are also different "technical" forms of Atheism, which branch off into the adherence of certain beliefs and/or philosophies that are much more complex than just a lack of belief in a god, as most people think. For example, you can be both an Atheist and Buddhist, or Wiccan and Atheist, Jainism and Atheist, etc. So some people who are Atheist, are in fact, spiritual contrary to popular belief.
As far as Agnosticism, similar concepts apply. Agnosticism simply means "I don't know and I can't be 100 percent sure if a god, deity, supreme being, etc. exists". Many of them adhere to the same beliefs as Atheists, if there is proof of a supreme being/beings, they would believe. A lot of people who are in the "I don't know, but tend to lean to the side of there being something else in the universe" consider themselves Agnostic; however in the strictest technical definition of the word, that wouldn't be correct. Agnostics also have different technical forms similar to Atheists depending on their particular viewpoint. Many Atheists actually consider Agnostics to be the same..since they lack the belief in the absence of proof. However, I do know that many people who are in the "I don't know for sure but I think there's something else" bunch who consider themselves Agnostic.