Throughout history, a basic purpose of government
has been to provide
(1) equal rights for all people
(2) laws to maintain order
(3) representation for all social classes
(4) separate political and religious systems

I believe, the answer is: "representation to all social classes"
because, in history we don't usually( mostly) find government providing equal rights or maintaining a strict law.. and if it had been like that, then such governments wouldn't hav become THE PAST
and politics can never b separated from religion, unless the nation is atheist