Doubtless a single council or chamber can promulgate decrees and enact laws; but it had never been the habit of the people of America, as it never had been the habit of their ancestors for at least a period of somewhat more than five centuries, to regard a single chamber as favorable to liberty, or to wise legislation.[72] The separation into two chambers of the lords spiritual and temporal, and the commons, in the English constitution, does not seem to have originated in a difference of personal rank, so much as in their position as separate estates of the realm. All the orders might have voted promiscuously in one house, and just as effectually signified the assent or dissent of Parliament to any measure proposed.[73] But the practice of making the assent of Parliament to consist in the concurrent and separate action of the two estates, though difficult to be traced to its origin in any distinct purpose or cause, became confirmed by the growing importance of the commons, by their jealousy and vigilance, and by the controlling position which they finally assumed. As Parliament gradually proceeded to its present constitution, and the separate rights and privileges of the two houses became established, it was found that the practice of discussing a measure in two assemblies, composed of different persons, holding their seats by a different tenure and representing different orders of the state, was in the highest degree conducive to the security of the subject, and to sound legislation.[74] So fully was the conviction of the practical convenience and utility of two chambers established in the Anglican mind, that, when representative government came to be established in the British North American Colonies, although the original reason for the division ceased to be applicable, it was retained for its incidental advantages. In none of these Colonies was there any difference of social condition, or of political privilege or power, recognized in the system of representation; and as there were, therefore, no separate estates or orders among the people, requiring to be protected against each other's encroachments, or holding different relations to the crown, we cannot attribute the adherence to the system of two chambers, on the part of those who solicited and received the privilege of establishing these colonial governments, to anything but their belief in its practical advantages for the purposes of legislation. Still less can we suppose, that after the Revolution, and when there no longer existed any such motive as might have influenced the crown in modelling the colonial after the imperial institutions, to a certain extent, the people of these States should have perpetuated in their constitutions the principle of a division of the legislature into two chambers, for any other purpose than to secure the practical benefits which they and their ancestors had always found to flow from it.