From what I understand it led to (young) people leaving the countryside to live in cities. This lead to large congregations of unhappy unemployed young people, all new to a particular area. These people then grouped up and protested about the ruling regime, which was the start of the current crisis.
Exactly, that's a good summary as far as I understand it. In other words, we're already seeing the impacts of food insecurity as a result of climate change and it will only get worse from here.