Marty is one of the last bastions for preserving knowledge and one of the biggest proponents for people to actually WANT to educate themselves in the US!
Not only asking the questions nobody wants to know ask, but also såreading the wealth of knowledge, honing the lactic acids, as well as opening our minds to new thoughts and topics. Enlightening us so to speak.
He creates debates about the REALLY important matters in life. The topics that will push our civilization forward, and not backward.
Mostly, we are stuck in a rut, always debating societys problems with blacks, immigrants, violence, gangrapes, vandalism etc, but Marty sees past that!
He sees the future for Earth and Humanity.
He pushes us forward into the 23rd century!
Always thinking outside the barn.