Democracy and forms government by Spinoza and Machiavelli: another perspective of the Modern Era analyzes the means by which the Spinoza- Machiavelli tradition presents itself as an alternative to the mainstream constitutional thought developed after their works. The understanding of the constitutional foundations that support not only democracy, but the other forms of government as well intends to demonstrate its conservation strategies by answering the following question: to what extent does this tradition offer alternatives to improve the understanding of the forms of government and, in particular, of democracy? In order to allow an understanding of the means necessary for the conservation of those constitutional principles that maintain the rule of law, it is believed that every government needs to incorporate the conflictive dynamic of the affects to its structures and, therefore, promote a plural management of the political affairs. This is the basis which would offer means for the improvement of the form of government itself. Methodologically, this study develops a qualitative examination of the concepts drawn from the critical theory of fortune in order to comprehend the varying circumstances that allow the preservation of that democratic dynamics that governments require. In this matter, a return to those principles experienced by past democratic experiments should clarify the means to the reintroduction of the desire for freedom. Throughout the opening to the participation that involves the absence of means that concentrate decisions in the just a few people, every form of government keeps power in its population hands.