Prisons system in the United States;This essay needs to be about how the prison system works and the problems with it, some topics that could be use are: -How does the prison system in America compares to the ones in different countries? -Private prison

This essay needs to be about how the prison system works and the problems with it, some topics that could be use are:

-How does the prison system in America compares to the ones in different countries? 
-Private prisons?
-What are the main issues in the system?
-What are the main issues in the actual prison?
-How are inmates affected?
-Whose at fault?
-Has the system always being this way? 
-What is stopping it from improving?
-Inmates for profit?
-Connection to the judicial system?