Lack of evidence does not prove that some things do not exist but neither does it prove that it does exist. I agree the part ?we don?t know them doesn?t mean they don?t exist.? However, you need a concrete evidence to show that it is true. As far as Buddha being an ordinary human being, he may have been before his enlightment but we are the in 21st century today. How many people in today?s world do you know can be like him? Start from the ones real close to you. I can safely say that times have changed. Let?s not divulge into theories of Marx or Adam Smith cause I think it?s kinda outta whack in this.