I think one of the main reasons sites like the Divine Lorraine aren't included in walking tours is its distance from blockbuster stops like Independence Mall, not to mention the racist and classist stereotype of the neighborhood as """dangerous""" that tourists might be reluctant to visit.
How would you plan out a walking tour that covered a wide enough geographic area, and got people out of "tourist areas," in order to recount a more comprehensive and recent history of Philadelphia? Would you partner with an organization that would just offer multiple themed walking tours in different areas? Or would you consider if a bus tour would be more appropriate? (Though that might be more costly...)
Have you talked with @johnesmithiii? I bet there's a lot of room for collaboration with his Philly History Truck plans...
Can't wait to see where you're going with this!
RE: A Tour Through the Past