As you probably know, Wheaton is a far Western lilly-white suburban community; Moody is in downtown Chicago just north of the Loop. When I attended the neighborhood was sketchy: there were some directions where one NEVER walked, day or night (the infamous Cabrini Green housing development, now razed, was just to the West of Moody). I understand the area around Moody has become quite upscale as the downtown area gradually has become revitalized.
I think Moody may have some positive effect: Moody radio is a major Chicago station, and as far as I know Moody students are still required to fulfill Christian service requirements, which include exposure to "rescue missions" serving the down & out.
Many years later I returned for a TV interview at a station located across the river just west of the Loop. I decided not to park in the secure lot behind a locked gate, but decided to park on the street. I got in OK but afterwards as I attempted to exit my parking space I was accosted by a streetwalker who latched onto my door handle and refused to let go. I caught the attention of a group of menacing young men, who started down the block towards me. I suddenly remembered seeing similar groups of pipe-carrying thugs roaming the streets and clubbing drunks for their weekly welfare allowance, and managed to disengage my car from the woman and flee the area.
Don't get me wrong: Chicago has some very nice areas - mostly north along Lake Michigan. However, there are vast areas of the city which are bleak and dangerous: I have vague memories of wide, depressing boulevards dissecting the city lined with shuttered storefronts and decaying businesses and factories.
Wheaton’s demographics have changed a bit since your time. The neighborhood around Moody’s used to be quite dicey, but it’s one of the most desirable in the City today. Given that Cook County is America’s North Korea, Moody’s has likely made some difference, but if the Devil had a playground it would be here.