The romans had a government that included both a body of senators and an emperor, much like today’s president and legislative branch. However they also allowed the people to have a say in government, which reflects the U.S. principle of “We the people.”
The Lusitania. It was torpedoed without any warning off the south coast of Ireland. 1,198 out of the 1,959 passengers/crew drowned.
Depending on the source, i would say at least a 2 to 1
They are significant because they help show how early humans lived their lives and told story's and showed how they lived.