Now the substance and constitution of the home, the relations and order of its various members, have been, and are, traditional. But it is a tradition that has always been capable of modification in each generation. In the unlettered, untravelling past, the factor of tradition was altogether dominant. Sons and daughters married and set up homes, morally, intellectually, economically, like those of their parents. Over great areas homogeneous traditions held, and it needed wars and conquests, or it needed missionaries and persecutors and conflicts, or it needed many generations of intercourse and filtration before a new tradition could replace or graft itself upon the old. But in the past hundred years or so the home conditions of the children of our English-speaking population have shown a disposition to break from tradition under influences that are increasing, and to become much more heterogeneous than were any home conditions before. The ways in which these modifications of the old home tradition have arisen will indicate the means and methods by which further modifications may be expected and attempted in the future. Modification has come to the average home tradition through two distinct, though no doubt finally interdependent channels. The first of these channels is the channel of changing economic necessities, using the phrase to cover everything from domestic conveniences at the one extreme to the financial foundation of the home at the other, and the next is the influx of new systems of thought, of feeling, and of interpretation about the general issues of life.