'Even now, all too few understand that a society may change its decisions, even if every single voter's preferences remain unchanged, merely because of such things as differences in the order in which alternatives come up for decision or because of seemingly innocuous changes in voting rules. Let us hope that, because of this translation, insights of Condorcet's that went unappreciated a couple of centuries ago will, in the light of the modern theory of collective choice, come to receive the wide recognition they deserve. This is a most welcome book.'