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The subject is so broad, that you have an opportunity to address it from many different perspectives. Here are some possible themes:
This is by no means a complete list, and each bullet point might be worthy of a thesis by itself.
The life and bloody career of Nikolai Krylenko, the Bolshevik who spearheaded the development of Soviet chess, and as a state prosecutor during Stalin's terror sent tens of thousands of people to torture and death, is probably worth an entire thesis all be itself
Thank you very much for all this topic suggestions!
Russians versus Fischer by Plisetsky and Voronkov
Checkmate in Prague by Pachman
Persona Non Grata by Kortchnoi
Achieving the Aim by Botvinnik
Center-Stage and Behind the Scenes by Averbakh