filled in background section in motivation page

motivation.md

@@ -6,8 +6,13 @@ title: Motivation
 **Background**
 
 Why is this important? 
+Intentional movement from one location to another has characterized human history irrespective of time and spatial scales. The globally-connected society that we live in would be impossible without the dynamic transport of people and objects between places. Whether via air, water, land, or even space, transit represents the spatial networks that enable us to experience the world outside of our own backyards. 
 
-What work has previously been done? 
+In particular, public transit reflects the truth that, although we may have unique ultimate origins and destinations, there are shared patterns in our movements that allow us to go from point A to point B together. Public transit has existed for much of recorded human history: for example, Greek mythology features one of the earliest tales of public transit in the story of the ferryman Charon, who required payment in the form of coins from travelers that needed to cross the river Styx (cite?). 
+
+The issue of payment for public transit has grown as transit networks have become more complicated. Where once single ferries or trains would connect regions adequately, now there are multiple routes serviced by multiple modes of transit operated by multiple different agencies within a singular region. As technology has enabled our society to become increasingly cashless, transit systems have followed. Understandably, for regions with multiple transit agencies, developing a unified system to allow seamless cashless payments between modes of transit and across agencies was necessary. Thus, the inception of the Puget Sound regional ORCA (One Regional Card for All) system was long awaited. 
+
+What work has previously been done? (thinking of moving this to the questions section maybe at the end to highlight past work of DSSG?)
 
 **Questions**