Sentence:  A century ago , Newman saw that <WSD>liberalism</WSD> ( what we now might call secularism ) would gradually but definitely make its mark on English Protestantism , and that even high Anglicanism would someday no longer be a `` serviceable breakwater against doctrinal errors more fundamental than its own '' . 
Meaning of the word marked with <WSD> tags:  a political orientation that favors social progress by reform and by changing laws rather than by revolution