A social organization must be formed which will allow free play to our passions, so that they may combine harmoniously. Our present society, called civilization,[74] does not, and cannot, do this. It is a system of oppression and repression, and is necessarily a frightful discord. Harmony can only be found in combinations of suitable numbers in communities known as phalanxes, and occupying buildings called phalansteries. Each phalanx is a unit, a great family, and dwells in a single building, a phalanstery. What is it that determines the proper number for a single phalanx? It is again the twelve passions of man. These can be combined in eight hundred and twenty different ways in as many individuals, and no possible combination ought to be unrepresented in the workers of any phalanx, or there will be a lack of perfect harmony. But in every community there will be found old men, infants, and those disabled on account of illness or accident. Provision must also be made for absences. There ought not, then, to be less than fifteen or sixteen hundred members in a phalanx, though four hundred is mentioned as a possible but undesirable minimum. Eighteen hundred to two thousand members are recommended. A larger number would produce discord, and is, therefore, inadmissible. But a further arrangement is necessary. These different characters thrown together helter-skelter would no more produce harmony than it would for one blindfolded to draw from a bag two thousand combinations of notes for the piano and play them in the order in which they were drawn. On the contrary, they must be ordered intelligently in series, the series combined into groups, and the groups united into the phalanx. Those having similar tastes form a series, which must consist of some seven, eight, or nine members. Several series having related tastes and desires unite in a group. A group undertakes some one kind of labor, as the care of fruit-trees, and a series concerns itself with one particular branch of the labor of a group, as the care of apple-trees.