Because they are not perfect and act like humans.
Answer: Race and racial inequality have powerfully shaped American history from its beginnings.
Americans like to think of the founding of the American colonies and, later, the United States, as
driven by the quest for freedom – initially, religious liberty and later political and economic
liberty. Yet, from the start, American society was equally founded on brutal forms of
domination, inequality and oppression which involved the absolute denial of freedom for slaves.
This is one of the great paradoxes of American history – how could the ideals of equality and
freedom coexist with slavery? We live with the ramifications of that paradox even today.
Explanation:
Thomas Jefferson's main purpose on writing the Declaration of Independence was to let the world know the reasons why the United States needed to separate from the government of Great Britain. The best way to doing so was to write the list of ways the King violated the human rights of the colonists, which justifies the Revolution and the Declaration of Independence itself.
Liberalism wasn't a cause of World War I.