You can pick up any book on basic logic and learn about positive and negative existential claims and the burden of proof. I have provided an extensive bibliography of suitable texts in previous replies. I am in almost perfect agreement with you on this. Yet you have argued the exact opposite in this very response. Nothing is right or wrong and there is no morality - and also, no justice.
Morality is determined by the opinions of the group.
Might makes right. The strong do not protect the weak, they devour them. It is the development of our civilization and standards of living and not any particular religious beliefs that have changed this. I would agree with the first part of that statement. Life is merely a consequence of the physical laws which determine the nature of the universe.