None of them are universal

Some claim that themes are universal and exhort other to accept the way they are. However , listening to people -who have different views in life-is irritated to human. People often values Confucius's , Plato's , and Aristotle's philosophies. But , no one ask the question: why do they have different thinking?It is really simple because they come from different aspects of life. Having their own unique live style enable those philosophers to develop the ideas of politic and human's life.