Thucydides,
History of the Peloponnesian War…
“ You it was who first allowed them to fortify their city after the Median war, and afterwards to erect the long walls--you who, then and now, are always depriving of freedom not only those whom they have enslaved, but also those who have as yet been your allies. For the true author of the subjugation of a people is not so much the immediate agent, as the power which permits it having the means to prevent it; particularly if that power aspires to the glory of being the liberator of Hellas. ”
