有产阶级得了权势，那封建的，家长的，山林的种种关系，便到处被他们消灭了。结合人和他的“生来的长上” 的封建的线索，被他们尽情剪断了，人和人中间，除了明目张胆的自利，刻薄寡情的现金主义，再也找不出甚么别的联结关系。宗教的热忱，义侠的血性，儿女的深情，早已在利害计较的冰水中淹死了。
The bourgeoisie，wherever it has got the upper hand，has put an end to all feudal，patriarchal，idyllic relations.It has pitilessly torn asunder the motley feudal ties that bound man to his“natural superiors”，and has left remaining no other nexus between man and man than naked self-interest，than callous“cash payment”.It has drowned the most heavenly ecstasies of religious fervor，of chivalrous enthusiasm，of philistine sentimentalism，in the icy water of egotistical calculation.
--（MANIFESTO OF THE COMMUNIST PARTY）
