Qué significa la idea de que el Estado es la unica fuente de derecho a la violencia

This cartoon appeared in 1916. the topic of the cartoon isa)the reason for the start of world war i.b)the success of us submarines in world war i.c)the military alliance between germany and mexico.d)the attitude in the us towards submarine warfare in world 

What were some of the great finds that portuguese sailors discovered after prince henry established his navigational school in 1415?

Which is the best description of how economic factors impacted westward expansion?