Johnathan Edwards was the most popular :)
you forgot to add the answers....
Everything from California to Alaska and between the Rocky Mountains and the Pacific Ocean was a British-held territory called Oregon. The trail pointed the way for the United States to expand westward to achieve what politicians of the day called its “Manifest Destiny” to reach “from sea to shining sea.”
In 1914, many Americans believed that the Monroe Doctrine encouraged them to follow a policy of "protectionism", since this doctrine stated that any further efforts by European nations to colonize the Americas would lead to an American retaliation.
American Indians had their own culture and philosophy. This understanding of the world as widely misunderstood by European settlers, who always saw Native Americans as an obstacle, or even menace to their expansionary interests.
Indians quickly understood the European settlers interests and in many cases adopted a stiff opposition and conflictive attitude towards them. This would eventually lead to memorable incidents, such as the Wounded Knee Massacre, where the US army killed numerous Indians due to a misunderstanding that escalated into a fight.
There was a clear lack of understanding between both parts and both of them have a degree of responsibility for it.