The purpose and methodology of this article is as follows: first, to understand the general nature of the current crisis (banking, financial, debt, currency, constitutional, political) from a socio-legal, economic, ideological and political perspective; then, to analyse the complexity of the multiple causes which have led to the current crisis in particular areas of law (financial, banking, securities, contract, competition and corporate law) in which it has manifested itself and the sectors of the economy it has affected; and, finally, to criticise law in action and the management of the crisis through political decision-making (state intrusiveness), that is, the various responses and reactions to the crisis and the effectiveness of the measures implemented by policy-makers and enforcers, and, inter alia, to question the constitutional legitimacy of the TBTF (Too-Big-to-Fail) theory as a predominant doctrine and criterion of state intervention in the economy. [...]