What do we mean by economic development today? How has this concept changed over the years? Economic development involves a qualitative change in the way goods and services are produced, through changes in resource use, production methods, workforce skills, technology, information or financial arrangements. A regional economy can grow without changing if it simply produces more of the same goods and services, in the same way. For example, an increase in a region's population will result in higher incomes and more demand-led growth, even in the absence of qualitative changes in the economic development environment. Development involves something more. Development and growth complement each other in the long term, although in the short term development mobilizes resources that could otherwise fuel more immediate economic growth. (Flammang, 1979.) According to Sen (1981, 1985, 1995), development is about humans experiencing a better life, the emphasis should be on the length and quality of that life, or on "rights", “abilities” and “functioning” of people. Development economics is arguably the most fundamental area of ​​the economics discipline. Economic development is the primary goal of the majority of the world's nations. Development depends on the deployment of a region's constituent elements – labor, financial capital, facilities and equipment, know-how, land, other physical resources and public and private infrastructure. Development is both a physical reality and a state of mind allowing access to a better life. Three fundamental core values ​​provide a practical guideline for understanding development which includes livelihood, self-esteem and freedom. These three Development Goals, Increase availability......middle of paper......unhealthy and poor. Thus, the human capital theory of the 1970s asserted that the quality of inputs determines development. We then realized that economic development had to be environmentally friendly to be sustainable. Other factors were also taken into account, including freedom and gender equality. Development economics is not neutral in terms of values. Historical, institutional factors and nepotism must be taken into account. Development can have many definitions: freedom (Singapore doesn't have it but is developing), literacy (Saudi Arabia has a low one), democracy (China doesn't have it but the country fastest developing in the world), sanitation, sustainability, low taxes (but Norway and Finland have the highest rates – but the government makes everything. There is no single answer, some may be wrong, others may be more right than wrong Theories of economic development provide us with many ideas but not many rules...