Polls and Errors: a Neverending Story - From the beginning to our times, the performances of the pre-electoral surveys have seen good and bad estimates. Nevertheless, the last period could be considered better, in some way, if compared to the errors occurred in the previous century. In this paper we recall the birth and the development of the pre-electoral surveys, first of all in Italy, to finally understand that, although there is a lot to work on - to reach the goal of a constant good estimation - the relevant bias are actually kept under some control, with the exception of a permanent underestimation of the centre-right wing.