Summary

Northern Securities Company v. United States…

It simply requires that a party's freedom in trade between the states shall not be cut down by contract with a stranger. So far as that phrase goes, it is lawful to abolish competition by any form of union. It would seem to me impossible to say that the words 'every contract in restraint of trade is a crime, punishable with imprisonment,' would sent the members of a partnership between, or a consolidation of, two trading corporations to prison,-still more impossible to say that it forbade one man or corporation to purchase as much stock as he liked in both.
Source: Wikisource

Northern Securities Company v. United States…

Of course, to push propositions to the extreme to which they naturally lead is often an unsafe guide. But at the same time the conviction cannot be escaped by me that principles and conduct bear a relation one to the other, especially in matters of public concern. The fathers founded our government upon an enduring basis of right, principle and of limitation of power. Destroy the principles and the limitations which they impose, and I am unable to say that conduct may not, when unrestrained, give rise to action doing violence to the great truths which the destroyed principles embodies.
Source: Wikisource

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