How important are warfare and murder in the construction of empire?

Question

Give examples as well...

Answer 1

The best answer on warfare I can give you is the example of the early English colonies in North AM. In 1712, there was the French and Indian war where men from the colonies fought on the side of the British against the French and Indians. This opened communications between people of different areas who would have never met otherwise and established a common bond.
As for Murder assisting in empire building one only has to look a al-Sadr in Iraq who had a more moderate religious leader killed who was working with the US to estabilsh a free and unified

Answer 2

Let's look at the Roman Empire:

Warfare was essential. As the Empire grew, it needed more and more revenue and food to support it's growing population. They also needed more and more slaves too. So Rome continually attacked its neighbours and expanded. Without the legions, Rome never would be ruled the world.

Murder was also essential. An Empire needs a secure emperor... an emperor who will rule for many years. A new Roman emperor always began a purge of people he thought was dangerous to his rule. People also died when the old emperor died and contenders for the throne tried to kill each other off and become the next emperor.