Passage 1
The effect of inventions and improvements in the productive arts is to save labor—that is, to enable the same result to be secured with less labor, or a greater result with the same labor. … [W]hile the primary effect of labor-saving improvements is to increase the power of labor, the secondary effect is to extend cultivation, and, where this lowers the margin of cultivation, to increase rent. Thus, where land is entirely appropriated … the ultimate effect of labor-saving machinery or improvements is to increase rent without increasing wages or interest. … [T]his … explains the otherwise perplexing fact that labor-saving machinery everywhere fails to benefit laborers.
George locates the harm not in machinery as an autonomous agent but in land appropriation and distribution: technical gains increase rent while labour fails to share them.
Book IV, ch. III, "The Effect of Improvements in the Arts upon the Distribution of Wealth," pp. 242–243