Yes, because one system would have to much power and be able to have full control and do whatever they want. This would lead to corruption and tyranny.
Giuseppe Garibaldi is best known for his military leadership in the unification of Italy in the 19th century.
Answer:
Um, hell yeah. What Penn did is homocide. Cold-blooded murder. That's a crime.
Try researching it !
There are tons of other resources.
I just don't want you to waste your precious time waiting here when someone won't answer :)