An Injustice Is Tolerable Only When It

[e]ach Person Is To Have An Equal Right To The Most Extensive Basic Liberty Compatible With A Similar Liberty For Others.

The Circumstances Of Justice May Be Described As The Normal Conditions Under Which Human Cooperation Is Both Possible And Necessary.

Man Is A Historical Being : The Realisations Of The Powers Of Human Individuals Living At Any One Time Takes The Cooperation Of Many Generations (or Even Societies) Over A Long Period Of Time. By Contrast With Humankind, Every Individual Animal Can And Does Do What For The Most Part It Might Do, Or What Any Other Of Its Kind Might Or Can Do That Lives At The Same Time.

An Injustice Is Tolerable Only When It Is Necessary To Avoid An Even Greater Injustice.

A Scheme Is Unjust When The Higher Expectations, One Or More Of Them, Are Excessive. If These Expectations Were Decreased, The Situation Of The Less Favored Would Be Improved.