anglicky Title of the thesis: Old age of yesterday and today : point of view of sociology, economy and philosofy Keywords: Interdisciplinarity, Old age, Development, Population, Pension Abstract: Leaded by interest in the new social phenomenon of the old age, we did a first research, which uncovered a big number of scientific disciplines concerning the topic. So we choosed this interdisciplinarity as the theme of our thesis. The aim of this work was to analyze it from the point of view of sociology, economics, and philosophy. Each of the disciplines was then discussed in one chapter, accompanied by research, in the fourth chapter. We see the contribution of work in diffusion of horizons of older and younger generations, specifically in the ...