We saw the collapse of colonial empires, the ending of illusions about communism, the beginnings of gender equality, and greater consciousness of the rights of children and the disadvantaged. And we live longer, to boot. All these changes are intimately related to the transformation of the economy and of tools for the generation of wealth. In the past, people relied on the physical power of men to hunt and farm.
在這個百年，人類見證了殖民帝國的瓦解、共產主義的幻滅、兩性平權的伊始、兒童及弱勢人權的提倡，人們也越來越長壽，而這一切幾乎都與經濟型態的變化、經濟工具的使用息息相關。