How controversial was Che Guevara's new man theory?

Che Guevara's "new man" theory, which envisioned a selfless, committed revolutionary motivated by altruism rather than material gain, sparked significant controversy. Critics argued that it was unrealistic, as it underestimated human nature and the complexities of individual motivation. Additionally, Guevara's emphasis on guerrilla warfare and his authoritarian approach to revolution raised ethical concerns about the means used to achieve his vision. Ultimately, while his ideals inspired many, they also faced considerable skepticism regarding their practical applicability in society.