In the nineteenth century the feminist quarrel once again becomes a partisan quarrel; one of the consequences of the Industrial Revolution is that women enter the labor force: at that point, women's demands leave the realm of the theoretical and find economic grounds; their adversaries become all the more aggressive; even though landed property is partially discredited, the bourgeoisie clings to the old values where family solidity guarantees private property: it insists all the more fiercely that woman's place be in the home as her emancipation becomes a real threat; even within the working class, men tried to thwart women's liberation because women were becoming dangerous competitors especially as women were used to working for low salaries.