The new convention met to solve this problem. The first thing they did was to close the door (unconstitutional by today's standard), but if they had not acted in this high-handed arrogant way, they might not have achieved such a brilliant result.
When the drafters released the document, they expected the public to be awed. But the public was skeptical: why are there no individual rights? It's all federalism and separation of powers and limited government. We want individual rights in there. The drafters said individual rights are meaningless if the government is unrestricted. Limited government, they said, eliminates the need to protect individual rights, because it's government that threatens rights. And if you have a strong government, then it can just ignore whatever rights are on paper anyhow. So that's why they didn't put them in.
Rather than re-write the constitution, they instead promised that once it's ratified, the first congress would enact a bill of rights. So the bill of rights was not a precondition for establishing the government, but the first congress did immediately proposed to amend the constitution, and the states immediately ratified them. So in a sense those amendments are really a part of the original constitution.
We'll cover 1A, 2A (a little), not 3A (obscure), not 4A (this is a big issue, but you get it in Crim Pro), some 5A (mostly covered elsewhere, but we do cover the federal due process clause), not 6A (elsewhere), not 7A. In 8A, we'll cover the death penalty. No 9A or 10A. 13A, 14A, and 15A. Those are biggies for us.
13A is the constitutionalization of the emancipation proclaimation. It's surplussage, in a sense: the constitutionality of slavery wasn't an issue any more. But even though slavery isn't much on the table these days, but this might address "badges" of slavery, like racial discrimination, so it has some current vitality.
14A provides that citizens of the US get the same privileges and immunities. But we'll focus mostly on the first section. Due process for states. And also equal protection for states (there's no such federal clause, but the federal due process clause incorporates this, so it governs the federal world as well).
15A no race discrimination in voting. We'll deal with this some.
We'll touch on 19A: voting rights for women.
And that's about it.
The constitution says that no government can deny equal protection. But every law denies equal protection in some way.
Of course, that's not what it means. What it means is "we don't like statutes that discriminate on a bad basis." So then what is a bad basis? Well, race would be one. "Suspect areas/categories" get looked at when a distinction is based on some artificial kind of basis.
Once an area is designated as being suspect, it gets strict scrutiny. That means it's very likely to fail. Unless it's affirmative action-- that one seems to persist. The way you can pass strict scrutiny is to show that there's a compelling state interest in perpetuating the discrimination. The compelling state interest must be narrowly tailored to correct whatever problem it addresses. So it's a 4-part analysis:
Generally nothing gets said about why some category is suspect, or why a right is fundamental.
If you're not in strict-scrutiny land, all you need is a rational basis. Which means it's very likely to succeed: the court defers to legislative policy. And as a rule, legislators are not irrational-- no legislation is so stupid that a rational legislator could not vote for it.