The philosophical study of right and wrong is known as ethics. This field has been studied for thousands of years and today has applications in a wide range of fields. Related topics include business and economic ethics.

Mexico, officially the United Mexican States, is a federal constitutional republic in North America. Working may require a work visa, which is difficult to get if you want to freelance for a short time. Most of the government-funded universities in major cities (state capital) have short courses on history, gastronomy, and cultural subjects, and most of them are almost free.