The settlements, however, were well fitted to be thus joined in closer bonds, in spite of minor differences. The country in which they were planted formed a geographical unit, the natural boundaries of which were emphasized by the human elements of hostile French, Indians, and Dutch. The economic and social life, based upon the geographical, religious, and political factors, was, in the main, remarkably homogeneous. Their attitude toward English policy, and their trade-relations with the rest of the empire, were very similar. There was not only no such clashing of interests as divided them from the staple colonies of the West Indies, but not even the minor differences that would have made impossible such a combination between Pennsylvania and Virginia. United action in the Indian war, and the religious Synod of the same year, had been the first steps taken in the formation of the political machinery for consideration of joint affairs. The way was smoothly paved, therefore, for the establishment of a genuine union. There was, however, one stumbling-block, which was the intense local feeling and exaggerated sense of importance of the separate settlements. The leaders in each of them must often have dreamed of what the future might have in store for the little colonies in which they had cast their lots, but it is impossible to say what those dreams may have been. They could not have included the actual development of the present British Empire or of the United States, the creation of each of which has been largely dependent upon economic forces and scientific inventions beyond the vision of any seventeenth-century mind. Whatever their dreams may have been, in practice the leaders adopted an opportunist policy, which, in general, may be described as the endeavor to keep from being entangled with England without losing the value of her protection. That any of them could seriously have thought that their individual colonies, as such, could ever become powerful nations, is unlikely. Added, therefore, to their policy regarding England was probably an opportunist policy regarding their neighbors. The extent and nature of the New England country had, by this time, become fairly well known, and the rate of growth could be more or less accurately forecast. With extending frontiers and but ill-defined territorial limits, disputes, already occurring, could also be foreseen as bound to become more frequent and more serious.