Relativists argue that there is no one objective truth or morality that applies to all people in all cultures. They point to the fact that different cultures have different moral codes, that our knowledge is limited and imperfect, and that our senses can deceive us.

Critics of relativism argue that it leads to moral skepticism, undermines the possibility of objective knowledge, and makes it impossible to communicate with people from other cultures.

Relativists respond to the objection that relativism leads to moral skepticism by arguing that moral skepticism is not a necessary consequence of relativism, that moral skepticism is a problem for all moral theories, not just relativism, and that moral skepticism is a good thing because it encourages people to be more tolerant of other cultures.

Relativists respond to the objection that relativism undermines the possibility of objective knowledge by arguing that objective knowledge is not possible, that objective knowledge is possible, but it is only relative to the individual or culture, and that objective knowledge is possible, but it is only possible in certain areas of inquiry.

Relativists respond to the objection that relativism makes it impossible to communicate with people from other cultures by arguing that communication with people from other cultures is possible, but it is difficult, that communication with people from other cultures is possible, but it requires a willingness to understand and appreciate other cultures, and that communication with people from other cultures is possible, but it requires a willingness to compromise.

Cultural relativism is the belief that the beliefs, values, and practices of a culture are relative to that culture and cannot be judged by the standards of another culture. Examples of cultural relativism include the belief that what is considered moral in one culture may be considered immoral in another culture, the belief that what is considered true in one culture may be considered false in another culture, and the belief that what is considered beautiful in one culture may be considered ugly in another culture.

Ethical relativism is the belief that moral values are relative to the individual or culture and cannot be judged by the standards of another individual or culture. Examples of ethical relativism include the belief that what is considered right or wrong in one culture may be considered wrong or right in another culture, the belief that what is considered good or bad in one culture may be considered bad or good in another culture, and the belief that what is considered just or unjust in one culture may be considered unjust or just in another culture.

Epistemological relativism is the belief that knowledge is relative to the individual or culture and cannot be judged by the standards of another individual or culture. Examples of epistemological relativism include the belief that what is considered true in one culture may be considered false in another culture, the belief that what is considered knowledge in one culture may be considered ignorance in another culture, and the belief that what is considered rational in one culture may be considered irrational in another culture.

Protagoras was a Greek philosopher who is considered to be one of the first proponents of relativism. He is famous for the saying, "Man is the measure of all things."

Plato was a Greek philosopher who is considered to be one of the first opponents of relativism. He argued that there is an objective truth that is independent of the individual or culture.

Theaetetus is a dialogue by Plato in which Socrates and Theaetetus discuss the nature of knowledge. In this dialogue, Socrates argues that there is no objective truth and that all knowledge is relative to the individual.

Metaphysics is a work by Aristotle in which he discusses the nature of reality. In this work, Aristotle argues that there is an objective truth that is independent of the individual or culture.

Richard Rorty is a contemporary American philosopher who is associated with relativism. He is known for his book, "Philosophy and the Mirror of Nature," in which he argues that there is no objective truth and that all knowledge is relative to the individual or culture.

John Rawls is a contemporary American philosopher who is associated with anti-relativism. He is known for his book, "A Theory of Justice," in which he argues that there is an objective truth and that all people have certain basic rights and freedoms.

The main arguments against relativism are that it leads to moral skepticism, undermines the possibility of objective knowledge, and makes it impossible to communicate with people from other cultures.