They evolved from earlier primates, of course.
By the way, did you know there's an entire Amazon forum devoted to evolution? Check it out for lots more evidence.
Not to mention these excellent books full of clear, empirical evidence:
Evolution: What the Fossils Say and Why It Matters
The Greatest Show on Earth: The Evidence for Evolution
Note that these articles and books are not collections of opinion, speculation, or ill-informed politically-driven attacks: they are presentations of objective, physical EVIDENCE clearly demonstrating the reality of evolution, including human evolution. Enjoy!