The Persistence of Social Groups

It is the doubtful advantage of incipient sciences that they must temporarily furnish refuge for all sorts of vagrant problems. The boundaries of new sciences are necessarily indefinite and indefensible. They are thus open to all the homeless. They therefore gather by degrees a miscellaneous content which cannot be managed. Then the process of limitation begins. The immediate effect is disappointing, but, on the other hand, precise bounds secure sciences against later disappointment.
The science of sociology is entering the stage of definition. It is beginning to assort the confused mass of problems that threatened to overwhelm it. Suffrage within the science is no longer unchallenged. The exact boundaries of the science are not yet beyond dispute, but in every direction earnest scientific efforts are evident to draw permanent lines of division. For a while the term "sociology" seemed to be a magic word that promised to solve all the riddles of history and of practical life, of ethics and of aesthetics, of religion and of politics.
The source of this error is in the conception that the subject-matter of sociology is the whole sum of occurrences which take place in society. From that standpoint all problems that do not belong to physical science seem to fall within the scope of sociology. It is self-evident that this standpoint is untenable. It is plainly nonsensical to throw into one big pot labeled "sociology" all those researches which have been satisfactorily conducted by national economy, history of civilization, philosophy, political science, statistics, demography, juridical science, and ethics...