It seems that the task of the philosophers of each time is to defend with reason and truth the “big human values” that exist in each time.
Values like what? Values like Freedom, Free Speech, Social Justice etc.
But how do we do that? Because, there still may be people who doubt their own existence!
So what philosophers do is put the thinking of each time in a weighing machine. And afterwards weigh and measure this thinking through the ideals of good and evil.