Developed countries are nations with advanced economies, high standards of living, and well-established infrastructure. They typically have a high Gross Domestic Product (GDP) per capita, which indicates a higher average income for their citizens. Examples of developed countries include the United States, Germany, and Japan. These countries often provide extensive social services, such as healthcare and education, contributing to a better quality of life for their residents. Additionally, developed countries usually have stable political systems and strong legal frameworks, which support economic growth and social stability.