The addition of these amendments to the Constitution was very important to the Founding Fathers. Some, like George Mason of Virginia, agreed to support ratification of the Constitution only on the assurance that the amendments spelling out individual rights would be passed immediately. And they were.
As written, the first 10 Amendments are restrictions only on the federal government, not on the states. Over the years, the U.S. Supreme Court has incorporated many of the restrictions to apply against the states, too, so that state governments may not restrict freedom of speech or press. It’s hard to see how there could be a more perfect instrument to restrict the power of government than the U.S. Constitution and it would be very dangerous to open up our Constitution for modern revisions as some people are trying to do by calling a new Constitutional Convention even though it is allowed by Article IV.
Listen to the radio commentary here: