It's an interesting thing, isn't it? And speaking of the thumbnail (which features Luffy from One Piece), in their world people also turn to piracy mainly just to survive, but also to rebel against the World Government who fucked them all over, almost every character is an orphan in that show. The WG are basically fucking jewish ZOG run by a cabal of inbred, "god-chosen" dysgenics, with the Navy being their loyal zogbots chasing the pirates down, not for justice but to maintain their authority and grip on the world. There are so many parallels between zionism, globohomo and jews that it's amazing how the author gets away with it. Hell, there's even such a thing as the "Void Century" - a period of time during which a great deal of crucial history was destroyed, so no one knows exactly how these inbreds came to power and what happened to the rulers of the old (who built powerful weapons capable of causing extinction-level disasters, likely to oppose the invaders). Anyone who tries to uncover history is put on the government's hit list and executed, which is what happened in one of the arcs where an entire island got glassed, once home to world-class historians and scientists.