The film ends with Marx and Engels publishing select theories, in a simple language for anyone to understand in a relatively short writing known as The Communist Manifesto the same year of the 1848 revolutions.

"[6] On Metacritic, the film has a weighted average score of 62 out of 100, based on 14 critics, indicating "generally favorable reviews".

[7] The Guardian's review by Peter Bradshaw gave the film four out of five stars and stated, "It shouldn't work, but it does, due to the intelligence of the acting and the stamina and concentration of the writing and directing.

"[8] In a review for Inside Higher Ed, Scott McLemee described the film as "a nuanced and surprisingly accurate portrait of the revolutionary as a young man", noting its faithfulness to the historical record.

[9] Writing for the New Statesman, Suzanne Moore described the film as "sparky, brave and totally absorbing" and "in many ways a conventional biopic, lifted by its performances, and by its insistence that ideas matter".