Abstract: In recent decades the role of mathematics in then analysis of economic and financial phenomena has greatly increased.
Unfortunately, the effects of such a process have not always been positive: mathematics has been used to give to some economic theories the appearance of "objective truths" hiding the fact that they actually stem from the ideological assumptions of their authors, or, even worse, to cover serious methodological mistakes.  This has often lead to ridiculous and grotesque results by economists claiming to be able to predict human behaviour.
I will illustrate my thesis with examples taken from works and articles in Game Theory and General Equilibrium Theory and present what, in my opinion, could be useful application of mathematical techniques in several fields such as  linguistic games, politics and the analysis of exploitation.