If God is all knowing then why didn't he prevent Adam and Eve from sinning? God in the Christian faith is said to be the all knowing, everlasting God. But if God is all knowing then why didn't he prevent Adam and Eve from eating from the tree of Good and Evil, or perhaps just not put it in the garden? I mean, God knew that they would disobey him, so why give Adam and Eve access to the tree?

Later on in the book of Genesis it is said that God regrets ever have making humans and floods the earth to get rid of them. Well, didn't God know that humans were going to turn out this way?
Why Did God Create the Universe (or, at least, Humanity)?

The answer to that will speak to your question about God's foreknowledge.

I will propose an executive summary: the purpose of humanity1 is to
know and love God. (Jn 17:3) The testimony of the Scripture is at least compatible
with this idea, though I find more than just circumstantial evidence in
support of it, what's written in the Bible does not say precisely that.

If we accept this (unproven here) conclusion, then God gave humans
free will in order that they might be capable of genuinely loving him.
True love is voluntary, so in order for us to be capable of loving God,
we also had to be capable of something else, including rebellion/sin.

So, even though God knew what choices we would make, if he actually
wanted people to love him, then he had to give them the chance
to do so. Otherwise, our entire existence would have been merely a
thought experiment that didn't turn out well—but that's not why God
created humanity. He wanted us to know and love him.

Even though God knew that not everyone would choose to love him, he
still wanted those who would love him to get to do so.



1 Technically, God created us for his pleasure (Rev 4:11), but this is not entirely informative. If you consider Genesis 1-3 and Revelation 21-22, the idea that how things will be in the end is similar to how they were in the beginning, and that God's desire for us has been the same all along. In Eden, God walked among humans and talked to them. That closeness ceased after humans sinned, but that intimacy is restored again after the resurrection. Jesus summed up eternal life this way: "that they may know [God]." (Jn 17:3).