Each of the atoms composing what we call the Wealth of Nations owes its value to the fact that it is a part of the great whole. [. . .] Millions of h… - Pyotr Kropotkin

Because, to do manual work now, means in reality to shut yourself up for ten or twelve hours a day in an unhealthy workshop, and to remain chained to the same task for twenty or thirty years, and maybe for your whole life.
It means to be doomed to a paltry wage, to the uncertainty of the morrow, to want of work, often to destitution, more often than not to death in a hospital, after having worked forty years to feed, clothe, amuse, and instruct others than yourself and your children.
It means to bear the stamp of inferiority all your life; because, whatever the politicians tell us, the manual worker is always considered inferior to the brain worker, and the one who has toiled ten hours in a workshop has not the time, and still less the means, to give himself the high delights of science and art, nor even to prepare himself to appreciate them; he must be content with the crumbs from the table of privileged persons.

Well-being - that is to say, the satisfaction of physical, artistic, and moral needs, has always been the most powerful stimulant to work. And where a hireling hardly succeeds to produce the bare necessities with difficulty, a free worker, who sees ease and luxury increasing for him and for others in proportion to his efforts, spends infinitely far more energy and intelligences and obtains first-class products in a far greater abundance. The one feels riveted to misery, the other hopes for ease and luxury in the future. In this lies the whole secret. Therefore a society aiming at the well-being of all, and at the possibility of all enjoying life in all its manifestations, will give voluntary work, which will be infinitely superior and yield far more than work had produced up till now under the goad of slavery, serfdom, or wagedom.

A revolution is more than the destruction of a political system. It implies the awakening of human intelligence, the increasing of the inventive spirit tenfold, a hundredfold; it is the dawn of a new, science — the science of men like Laplace, Lamarck, Lavoisier. It is a revolution in the minds of men, more than in their institutions.