<span>The one-drop rule is a sociological and
legal principle of racial classification that was historically
prominent in the United States asserting that any person with even one ancestor of sub-Saharan-African ancestry ("one drop" of black blood) is considered to be black (Negro in historical terms)</span>
The key ideas of "The Prince" were about power and
how leaders specifically princes could seek to gain power and also how they
could go about maintaining power.