Western expansion pushed them west leaving them with less land, and therefore, they had to compete for resources and such among other tribes. So it caused rivalry and competition among the many tribes and also among the settlers.<span>
</span><span>Hope this helps!</span>
James Madison played a great role in establishment of the US as a republic. During the writing of the constitution, the founding fathers were adamant that they wanted democratic system of governance. However, they were torn between a direct democracy and a republican democracy. James Madison dismissed a direct democracy since the US is a large country and thus impossible to be governed through direct pure democracy. Instead, the father of the constitution argued for a scheme of representation in a republican setting. He especially lauded such a government since it even catered for the rights of the minority than in direct democracies.
Individualism, discernment and intelligence.