Neocolonialism is a very oppressive and inhumane practice. It is the use of money, power, globalization, and cultural forces to control a country. It is most often the European or Western countries using their wealth and power to exploit and entire nation of people by controlling them economically.
The Termination Act of 1953 released 109 native nations from Federal wardship. The citizens of the terminated nations became full citizens of the United States. In the 1970s, a few of these terminated nations were "restored." While "full citizenship" sounds attractive, it meant that reservation land reverted to the U.S government; the Native Americans of these nations lost their land ownership status and had to accept state and federal tax burdens.
Internal colonialism is a phrase that relates to the way in which ethnic minorities or other distinct groups are "colonised" by a group that has the power in that country. For example, you might like to consider the tensions in Rwanda between the Hutus and the Tutsis as an example of internal colonialism, as one group seized the power only to treat the other group as an oppressed people.
Color gradient most frequently has historically been used to describe a progression of colors, gradually changing from one hue to another. Based on the other terms in your list, I am guessing your study might be referring to the variation of shades of skin colors encompassed within the different races of people around the world. As races are becoming more intermingled through interracial unions, skin colors and features are gradually becoming less differentiated.
Neocolonialism literally means a new "colonialism." This usually take place through modern methods and methods that seem neutral like globalization, economics, ideology, and capitalism. It is the ability of one country to keep getting wealthier off of another country. In other words, it is the ability of those with power to exercises it in ways that seem beneficial to all, but in the end only really benefits thosewith power. It was first coined by Kwame Nkrumah, the first post-independence president of Ghana.
The term "borderlands" often refers to the areas on both sides of an international border, such as the border between the United States and Mexico or the border (in the middle ages) between England and Scotland. Often borderlands are areas of conflict or tension. The Mexican/U. S. borderlands are the focus of much recent fiction written by Cormac McCarthy.
Treaty of Guadalupe Hidalgo was the treaty that ended the Mexian American War in 1848. It gave the US the land that is now the Southwestern US.
Neocolonialism is the process of treating a foreign country as if it is a colony. this is mostly with reference to economics -- the rich country uses the poorer country as a source of raw materials and other cheap stuff, keeping the poorer economy in a weak position.