Sufficiency Economy was introduced by His Majesty King Bhumibol Adulyadej to Thai people at all levels for sustainable development in 1974. It is a philosophy that guides Thai people to behave and live their lives in the middle path in the world of globalization that filled with foreign investment, new technology, and competitive markets. Therefore, the philosophy was used as a guideline to determine policies, planning, and formulating the national economic and social development plan. The plan helps support Thai people to gain a good living and assist the country and people at the grassroots level in facing and overcoming the economic crisis. Sufficiency consists of moderation, reasonableness, and self - immunity that are based on integrity of people's knowledge and moral ethic. Sufficiency Economy is applied in different areas such as poverty reduction, rural development, environment, education, and etc. to create balance and cope appropriately with challenges arising from rapid socioeconomic, environmental and cultural changes in the world. So ,it is essential for people to adhere to moral and share with others in society as well as coexist with nature.