Thomas D'Arcy McGee

One leading fact, which we have to follow in all its consequences through the whole of the fifteenth century, is the division of the English and of the Anglo-Irish interest into two parties, Lancasterians and Yorkists. This division of the foreign power will be found to have produced a corresponding sense of security in the minds of the native population, and thus deprived them of that next best thing to a united national action, the combining effects of a common external danger.