The eighth virtue practiced by Benjamin Franklin was justice. Franklin described justice as (do) wrong (to) none by doing injuries or omitting the benefits that are your duty.
Everyone wants to live in a fair world. We want others to treat us fairly. This is something which was known even 2000 years ago. As Jesus told - Do unto others as you would want others to do unto you. This is known as the Golden Rule or the law of reciprocity. This is a principle which is seen in many religions and culture. If you want to be treated fairly treat others fairly. This is a very simple principle. You reap what you sow. You get what you give. Thus if you want to get justice, you have to be to be just. One cannot expect to be treated in a just manner while inflicting injustice or injuries to others. Similarly one cannot be partial and stop the benefits that are due to others and expect impartiality from others.
To be fair and just in all dealings requires a high degree of moral values. This is an investment which does not seem to pay in the short run. There have been many examples in real life and in stories, where the protagonist has been fair and just in all his dealings, but life has not treated him fairly. In real life, we see that the ones who wield muscle power, political power, and the ones who barge their way through things, the corrupt people seem to make the most progress in life. The ones who follow the law, the one who is on the path of the truth and Justice seem to lag behind. But if you look at the conscience of these two different type of people, you will find that the latter has a clear conscience. They go to the bed every night without any worries and fear in their mind.
There is another side of justice as well. One can be just and at the same time bear injustice from another person. In such a situation, one should not submit to the injustice. One has to raise his voice against it. This requires some degree of courage. As a student of success, we should develop this virtue of being just to everyone and have the courage to stand up against injustice.