Political theorists no doubt have to take the history of injustice seriously, for example, indentured servitude. The concept of historical injustice takes note of a variety of historical wrongs that continue into the present in some form or the other and tend to resist repair. Two reasons might account for resistance to repair. One, not only are the roots of injustice buried deep in history, injustice itself constitutes economic structures, ideologies of discrimination and modes of representation. Two, the category of historical injustice generally extends across a number of wrongs such as economic deprivation, social exclusion and lack of recognition. This category is complex, not only because of the overlap between a number of wrongs, but because one or the other wrong, generally exclusion, tends to acquire partial autonomy from others. This is borne out by the history of repair efforts across the world.

What is the main idea that we can infer from the passage?