Gentrification, and the subsequent displacement / exclusion of the poor from areas once 'theirs', also affects the Global South (South Africa, here)
https://www.bbc.co.uk/news/world-africa-44777755
The Islamic angle is also of interest - on this subject I once marked a dissertation from S A, Cape Town University, which gave interesting insights into the local food retailing in Cape Town.
The Black community run 'spaza' (= hidden) shops, food stores which are basically informal affairs run, literally, from sheds and garages next to houses - you can see these on Google Streeview in the less affluent residential parts of Cape Town. These shops are very closely connected with their local community in that they will readily offer credit when customers fall on hard times; of course some of this credit is never repaid, and to allow for this, 'spaza' shop prices are jacked up a little. Everyone went along with this - you never know when it will be YOU who needs that credit. However in recent years the retail food economy has been penetrated by Somalis who undercut the spazas by offering lower prices and NO credit. An interesting retail / community conflict.
http://fooddeserts.org/images/000SouthAfrica.htm
Dr Hillary J. Shaw
Director and Senior Research Consultant
Shaw Food Solutions
Newport
Shropshire
TF10 8QE
www.fooddeserts.org