Ka kammala wannan furcin: A ƙarni na gaba bayan Tracy, kalmar nan "ra'ayin akida" tana da ma'ana mai kyau da marar kyau. A lokacin wannan ƙarni na gaba, lokacin da gwamnatocin bayan-Napoleonic suka ɗauki halin juyin juya hali, ya rinjayi masu tunanin Italiyanci, Mutanen Espanya da Rasha waɗanda suka fara bayyana kansu a matsayin "masu sassaucin ra'ayi" kuma waɗanda suka yi ƙoƙari su sake haifar da ayyukan juyin juya hali a farkon 1820s, ciki har da 'yan tawayen Carlist a Spain; da Carbonari al'ummomi a Faransa da Italiya; da kuma
'Yan Decembrists a Rasha. Karl Marx ya ɗauki ma'anar ma'anar Napoleon na kalmar, ta yin amfani da shi a cikin rubuce-rubucensa, inda ya taɓa bayyana Tracy a matsayin (wani'mai koyar da ilimin bourgeois na kifi').