In which Bolshevik love of mass production showed itself

[Xinfu]

-People in Russia pushed revolution to every corner of the vast continent, in which Bolshevik love of mass production showed itself.

With OF MASS PRODUCTION, a post-modifier that shows definiteness, must there be THE before BOLSHEVIK?

[Rusty]

I see nothing wrong with the sentence as written, nor as you have proposed. Both work.

[poli]

-People in Russia pushed revolution to every corner of the vast continent, in which Bolshevik love of mass production showed itself.(manifested itself instead of showed itself sounds better to me)

With OF MASS PRODUCTION, a post-modifier that shows definiteness, must there be THE before BOLSHEVIK?
"The" is optional,and it's an option I would choose. The comma, however, is wrong and should be omitted.