I have spoken of the psychological tendency for group to seek group. Moreover, it is not possible to isolate yourself in your local group because few local needs can be met without joining with other localities, which have these same needs, in order to secure city or state action. We cannot get municipal regulation for the dance-hall in our neighborhood without joining with other neighborhoods which want the same thing and securing municipal regulation for all city dance-halls. If we want better housing laws, grants for industrial education, we join with other groups who want these things and become the state. And even if some need seems purely local, the method of satisfying it ought not to be for the South End to pull as hard as it can for a new ward building, say, while the North End is also pulling as hard as it can for a new ward building, and the winner of such tug-of-war to get the appropriation. If the South End wants a new ward building it should understand how much money is available for ward buildings, and if only enough for one this year, consider where it is most needed. Probably, whatever the evidence, it will be decided that it is most needed in the South End, but a step will be taken towards a different kind of decision in the future. And we join not only to secure city and state but also federal action. If we want a river or harbor appropriation, we go to Congress. And if such demands are supplied at present on the log-rolling basis, we can only hope that this will not always be so. When group organization has vitalized our whole political life, there may then be some chance that log-rolling will be repudiated. And we do not stop even at Washington. Immigration is a national and international problem, but the immigrant may live next door to you, and thus the immigration question becomes one of nearest concern. This intricate interweaving of our life allows no man to live to himself or to his neighborhood. Then when neighborhood joins with neighborhood all the lessons learned in the simple group must be practised in the complex one. As the group lesson includes not only my responsibility _to_ my group but my responsibility _for_ my group, so I learn not only my duty to my neighborhood but that I am responsible for my neighborhood. Also it is seen that as the individuals of a group are interdependent, so the various groups are interdependent, and the problem is to understand just in what way they are interdependent and how they can be adjusted to one another. The process of the joining of several groups into a larger whole is exactly the same as the joining of individuals to form a group—a reciprocal interaction and correlation.