It is usual that, in the field of politics and the economy , divide the world in two, differentiating between the First world and the Third World . It is a fragmentation linked to development achieved by each country .
He First world , in this framework, it is formed by most developed nations at social and economic level . He Third World , instead, the state that show a less development .
Usually the notion of first world is associated with human development Index (HDI ) that elaborates the United Nations Development Program (UNDP ). The countries better positioned in this ranking are part of the first world, offering a good quality of life to most of its population.
It is understood that in the first world citizens have access to quality services . According to experts in political science and sociology, development often depends on the existence of strong institutions that guarantee the functioning of the democracy and the empire of the law .
It is important to mention that the distinction between these "Worlds" arose after the Second World War . At that time he was born western block (capitalist) and the eastern block (socialist), leaving the rest of the nations in the third world. Over time, the positioning that located the societies more advanced in the first world and the rest, in the third world. The second world concept, on the contrary, was deprecated.
It is currently located in the first world at England , Japan , Germany , Australia and U.S , among others. For segmentation the HDI and other factors, such as gross domestic product (GDP ).