Another influential factor within the projection of the political parties its historical behavior, dice to that this it can explain why these have a defined behavior. The history of a party also allows to observe and to analyze the behavior of the society towards these and can define what party is accepted. A clear example of this is the transition of being able of the PRI to the BREAD, since of approximately 70 years the PRI was in favor in the power and this was, at the end of its government, by fear since society feared to this party and it did not know the consequences to vote by another party. Meanwhile the BREAD managed to obtain to be able when Fox postulated itself to the presidency and won, is probable that this event has occurred to that people began to distrust of the PRI and looked for a party that carried out the change, thus offered her confidence him to the BREAD. At present the society is not as with the government who the BREAD has exerted in both presidential terms that take in the power, thus is probable that another political party manages to obtain the power if it finds the way to recover the confidence of the society. In order to understand a little better we can give the example of the passed elections, in which Caldern and Obrador they were fought in wins of the presidency, thus is possible to be deduced that if the society is not in agreement with the performance of Caldern, for the next presidential term will vote by the PRD. This fact is not an affirmation since in the course of the years, the PRD is lost credibility and confidence, thus cannot be assured what party politician is the one that manages to raise the power the next presidential term. The previous point can be complemented with the last element to evaluate, the confidence that the political parties have with the society.