How is Piracy in Somalia a Social Injustice?

Ok so for language arts we got different current events to search up and explain how its a social injustice and who is it effecting and if anything can be done about it. I go Piracy in Somalia, and I am not quite sure how its a social injustice. So that is bascially all I need to know, "How is Piracy in Somalia a Social Injustice?" the rest I can figure out by myself once I find this out.