This is not correct. Man is not basically good. If you believe that individuals are basically good, then evil exists because something external like "society" makes men do bad things. This removes responsibility for individual choices. This is incredibly flawed thinking because society is made up of individuals. If these individuals were pre-disposed for good, then society could not be a negative influence.
If you believe that men are basically flawed, then, as John Adams said, "Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other." James Madison opined that our Constitution requires, "...sufficient virtue among men for self-government, otherwise, nothing less than the chains of despotism can restrain them from destroying and devouring one another". It seems unlikely that if people were basically good, the founders would be worried about such things.
I ask you to look around and tell me that you observe that, left to their own devices, men are basically good...