The 10th ceased to be in 1938 so very different in every sense from geographic to demographic.
In 1965 the metropolitan borough of Shoreditch and metropolitan borough of Stoke Newington were merged into Hackney so it in effect expanded.
Historically in the late 1500-1700s Hackney was a well to do sub-urban area. That changed drastically in the 1800s as London expanded. By the turn of the last century Hackney was a mix of residential and industrial. Mostly the former.
It was subject to two ‘slum clearances’ one pre-WW2 and another in the 1950s and 1960s which cost the area much of its Georgian and Victorian housing.
The Luftwaffe also played their role in forcing new developments upon the area.
http://bombsight.org/explore/greater-london/hackney/
Postwar it took a long time to recover. Just prior to the millennium with the London property bubble developing it was one of the few affordable places to buy a house. The desirability however snowballed and now it is seeing gentrification.
It is a fascinating area and the place I call home.
Some sites showing the changes below…
https://www.mylondon.news/news/nosta...e-22617581.amp
Historic video here, one of the first promoting new-look social housing in 1935:
https://www.londonsscreenarchives.org.uk/title/241/
https://municipaldreams.wordpress.co...03/08/hackney/