This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...ntractual agreements among men, and the more urgent their need of protection for the security of such agreements.
read full book
Even a primitive barter society could not function if a man agreed
to trade a bushel of potatoes for a basket of eggs and, having received the eggs, refused to deliver the potatoes. Visualize what this sort of whim-directed action would mean in an industrial s
ociety where men deliver a billion dollars’ worth of goods on credit, or contract to build multimillion-dollar structures, or sign ninety-nine-year leases.
A unilateral breach of...