In this subject will treat to attach to the/to the student the real operation of the main actors of the contemporary democracies, *singularizándoos in the most determinant of the representative democracies, the political parties and the new movements that -still- play with the old rules and, how no, in the electoral systems through the which pipes at will popular of the civil society that afterwards those interpret. Finally, we will #analyze some gave electoral systems compared more *relevantes, in the that will visualize *brevementes *cadansúas democratic cultures.