What did the "Grahams–Tewksburys: The Pleasant Valley War" teach us about human nature? How can we overcome this negative tendency in humankind?
(detailed answers only please)

The Pleasant Valley War, sometimes called the Tonto Basin Feud, or Tonto Basin War, or Tewksbury-Graham Feud, was a range war fought in Pleasant Valley, Arizona in the years 1882-1892. The conflict involved two feuding families, the ranchers Grahams and Tewksburys. The Tewksburys, who were part Indian, started their operations as cattle ranchers before branching out to sheep.[2]

Pleasant Valley is located in Gila County, Arizona, but many of the events related to this feud took place in neighboring Apache and Navajo counties. Other neighborhood Arizona parts, such as Holbrook and Globe, were the setting of its bloodiest battles. Although the feud was originally fought between the Tewksburys and the Grahams against the well-established cattleman James Stinson, it soon involved other cattlemen associations, sheepmen, hired guns, cowboys and Arizona lawmen. The feud lasted for about a decade, with its most deadly incidents between 1886 and 1887; the last-known killing took place in 1892.[3]

Explanation:

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)