Islam is the BEST in all aspects of life, be it Social, Political, Economical, Religious & so on.
The CREATOR of everything (Allah) sent to Mankind (as best of His creature) Messangers or Prophets in every ERA. He didn't send a Prophet unless the previous message was corrupted. Meaning Every ERA is meant to follow their Prophet.....MUHAMMAD S.A.W is the Messanger of this LAST ERA, so we have to follow his message...
Through Prophet Muhammad, the Creator tells us in the Holly Quran : Adh-Dhaariyat : 56

وَمَا خَلَقْتُ الْجِنَّ وَالْإِنسَ إِلَّا لِيَعْبُدُونِ

And I did not create the jinn and mankind except to worship Me. That means the main purpose we were created is to worship.....

That's what I always tell friends.....