This thesis analyses the validity of efficient market hypothesis in both developed and developing countries, comparing the structural and social changes in different systems of economy which are market economy, traditional, mixed and command. The thesis aims to focus on the ups and downs of each economic system analyzing each both separately and in comparison, with the other economic systems. Parallel to all the above mentioned, the thesis aims to present a new economic model, which can also be referred as a system, called humanism since it bases all its main ideas on the values of humanity and justice for all. In this analysis, the work has been conducted on the recent statistic indicators for population, inventions, and in order to get a general overview of the welfare of the world population, the ratio for suicides and the relation with the occupations too. Since it has been analyzed in the macro level, indicators for certain number of countries have been viewed with the purpose of comparison and specification. Fertility rate, infant mortality rate, homicide rate, unemployment and homelessness rates for certain countries of the world provide a clear view of the current and historic economic systems enabling the fair judgement of each comparably to reveal the background for the introduced economic model. Having each economic system analyzed with its types and compared to the other economic systems besides providing the statistical view of the contemporary world, this work concludes on the significance of the introduction of the new economic system which is considered to be an inseparable part of the development of human history.