> Would going back to medieval times fix it?

Going back to the 90s probably would.

> The decrease in the number of people affected by hunger has happened in a period where the world population has increased by 2.2 billion - from 5,3 billion in 1990 to 7.5 billion in 2018. The share of undernourished people in the world has therefore fallen markedly in the past three decades. From 19% in 1990 to 10.8% in 2018.

https://www.theworldcounts.com/challenges/people-and-poverty...

Why don't you go ask the 189 million people that since 1990 have avoided hunger if they agree?

Was social media required to feed those people? I don't think hunger in the 90s was a technology problem.

Yes, actually. Social media and internet made ad industry much more effective, which in turn made wonders in commerce, which is exactly what raised people out of hunger.

A lot of people in southeastern Asia and China are working in industry and live tens time better than subsiste farmers just one generation before them exactly because the niche trinkets they make can now be sold on instagram.