"At the other hand the guiding principles in the case at certain other points have undergone a certain refinement of interpretation with a view to greater ease and security for trade and investment; and there has, in effect, been some slight abridgement of the freedom of combination and concerted action at any point where an unguarded exercise of such freedom would hamper trade or curtail the profits of business, -- for the modern era has turned out to be an era of business enterprise, dominated by the paramount claims of trade and investment. In point of formal requirements, these restrictions imposed on concerted action "in restraint of trade" fall in equal measure on the vested interests engaged in business and on the working population engaged in industry. So that the measures taken to safeguard the natural rights of ownership apply with equal force to those who own and those who do not. "The majestic equality of the law forbids the rich as well as the poor to sleep under bridges or to beg on the street corners." But it has turned out on trial that the vested interests of business are not seriously hampered by these restrictions; inasmuch as any formal restriction on any concerted action between the owners of such vested interests can always be got around by a formal coalition of ownership in the shape of a corporation. The extensive resort to corporate combination of ownership, which is so marked a feature of the nineteenth century, was not foreseen and was not taken into account in the eighteenth century, when the constituent principles of the modern point of view found their way into the common law."