Overview: U. Vianna Filho In his historical evolution, man has been able to dominate nature by means of his technological achievements, his knowledge and his inventiveness, attaining an increasing control over the world and its organization. As a result, his power over his fellow men has also increased, giving him more ,and more responsibility which leads, of necessity, to one existential problem: is the contemporary man, with all his power and knowledge, really happy? Technological progress has brought him several rights and desires: health, better insight into the future and greater control
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