Without any political rights, it was almost completely impossible for Native Americans to fight for their legal rights. This wouldn’t have been a problem until 1871, when it was made clear they had absolutely no rights whatsoever, they were not even referenced in the United States Constitution. The Law of 1871 transcended the laws of 1851 and 1868 in that these, Native American’s legal rights were entirely removed, deliberately leaving a legal black hole. Previous actions such as relocations of the Black Hills of Dakota to the Sioux were contingent to the Sioux being realised as legal entities. This therefore had many subsequent effects; as early as 1868, built in majority claims allowed Indians to surrender their status and gain American nationhood. This legal affront on Native Americans by both civil progressiveness and racial nationalists greatly prevented their ability to regain any of their lost political, social or economic rights, and was done deliberately, as was the case with the Standing bear case, where the United Sates government did not overrule a decision made by a local court which restored some of the rights of the tribal leader, for fear of setting a federal precedent where Native Americans were established as a legal entity. Needles to say without this recognition, Native Americans had no influence within the courts themselves; there were no Native judges or lawyers, for example. Furthermore, when someone like Red cloud was shot for resisting arrest, nobody cared for there was no legal capacity for the Native Americans to respond – it is not just that the could not defend themselves from accusation; they could not even prosecute, or speak against those committing atrocities unto them. This legal vacuum not only affected their political capacity, but made it entirely acceptable to ravage their culture, ransack their land rape their women.
Termed ‘ethnocide’, the destruction of Indian social culture and customs was dramatic. Their specific myths, animalism, dances and dress disappeared rapidly and the influences of social implosion i.e. mass population growth, forced migrations ad perhaps alcohol led to loss of any sense of identity, the purpose of the progressiveness. Young Native Americans children were forced into boarding schools, punished for speaking their own language, ostracised by staff and pupils, as a minority; the death rate in these school was 30% amongst Native American students. Sometimes this manifested itself horrifically. The Ghost Dance Massacre of 1880, when white settlers emerge from behind tepees and annihilated everything the came across.
The onset of industrialisation rendered much of the social culture of the Natives as entirely meaningless too, as much of it was based on economic practice. The glorification of the buffalo made sense when buffaloes were abundant in numbers and the Native Americans were free to follow their trail, but following the killing of thousands by Buffalo Bill and others, and the confinement to reservations, hunting and other economic, ritualised practises were damaged irreversibly, leaving the Natives short of means to gather food, hide and money.
A much larger economic impact of Westward expansion on Native Americans was their sheer poverty, deprivation and starvation. Placed on small reservations, without knowledge of how to farm, many Natives often wasted away, unable to carry out subsistence farming as they knew not how to. They began to rely on government grants and external food sources from the Indian Bureau. Many of their fishing rights were removed too; and without being able to expand their economy, they began to diminish in numbers. The Miriam Report of 1928 suggested that the Dawes Act entirely failed in assimilating Native Americans into society, in fact doing the exact opposite; ostracising them. With starvation came real population collapse; in 1865, there were 300-400,000 Native Americans; by 1890, there were only 100,000 remaining, which obviously affected their economic growth capacity; only the Cherokee, who discovered gold, and few other tribes, survive to this day.
To conclude, there are many different ways in which Westward expansion affected Native Americans, be it economic, political, social, legal or a mixture of them. The Natives economic lack of power meant that their legal and political rights need not be respected and their social culture became devoid of meaning. The intentional action by the Federal Government and Congress, combined with the economic backdrop of industrialisation and the ensuing collapse of any political or social autonomy as well as the sheer scale of brutal murder, by way of either reservation, deprivation or assassination, impacted on an irrevocable, immeasurable and incomprehensible scale on those who owned the continent.