The answer is <em>Sales Tax</em> can be described as Indirect and Regressive. It is indirect because the retribution that the consumer is going pay is collected by the seller, who acts as an intermediary between the people and the government and then is handed to the government (contrary to the direct type in which the taxation amount goes directly into the government's arks).
This type of system is also regressive because it doesn't change (increasing or decreasing) according to the payer's income. Instead, it puts a heavier contribution load on the people with lower incomes, and not on the rich and more wealthy part of the population.
<em>African slavery was introduced to the Americans early on because of the needs of the country for laborers (for their farms). During these times, countries like France and Great Britain are in the country running different plantations. Americans are fighting them off, and some who they got caught in the warring times and some Africans whom they kidnapped from their homes were pushed to work for them in exchange for foods and accommodations. African slavery started in the 17th centuries and ended in 1863 when Abraham Lincoln made a proclamation of freeing all slaves in United States.</em>
Social Darwinism is the term given to various theories of society which rise in the North America, Western Europe and United Kingdom during 1870s. The theories are applied to natural selection and survival of the fittest.