What happened in 1980?
The cause of literally everything of course, Suburbanisation, urban renewal and the decline of American Industry in the 70s
While he did ruin so many things, the drop we are looking at was before his election as it took place between 1970 and 1980 and therefore he wasn't a direct cause in the population decline of Philadelphia, Nixon on the other hand...
Philadelphia also bombed itself in 1985
OK, but we are discussing the decline of Philadelphia in the 1970s!! Not the 80s!













