Revolutions produce other men, not new men. Halfway between truth and endless error, the mold of the species is permanent. That is Earth's burden.
The quote from Barbara W. Tuchman's "The First Salute" highlights the idea that revolutions do not fundamentally change human nature; instead, they bring forth new individuals who are shaped by the same inherent traits. Change, therefore, is superficial and does not alter the core essence of humanity. This suggests that while social upheaval may transform political and social structures, the underlying characteristics of people remain constant.
The notion that humans are bound by a permanent mold implies a continuity in human behavior and motivations, regardless of the era or revolution. This "burden" of humanity indicates that despite efforts for profound change, history often repeats itself as people act based on their intrinsic nature. Tuchman reflects on the cyclical nature of human struggles and the limitations that every generation faces when seeking progress.