The slogan of progress is changing from the full dinner pail to the full garage. It's the same each time with progress. Progress is the life-style of man. The general life of the human race is called Progress, and so is its collective march. Physics and Politics.
All progress is experimental.
Human development is a form of chronological unfairness, since late-comers are able to profit by the labors of their predecessors without paying the same price. The reason for the slow progress of the world seems to lie in a single fact. Every man is born under the yoke, and grows up beneath the oppressions of his age. He can only get a vision of the unselfish forces in the world by appealing to them, and every appeal is a call to arms. If he fights he must fight, not one man, but a conspiracy.