There's evidence of human civilization and agriculture going back at least 10,000 years. You have to be extremely willfully ignorant to think the earth is only 4,000 years old. Hell the pyramid of Giza is older than that.
The craziest thing is new archeological discoveries keep pushing modern humans further and further back into pre-history. Almost makes me wonder if we'll come full circle and go "yeah humans did in fact coexist with dinosaurs, and here's proof at least one rode one" /hj