>> guest: bernard baylin was a leading professor of history at harvard, the man who whereon a pulitzer prize-winning book called the ideological origins of the late revolution in, i think, 1968. >> host: roger in burbank, you've been holding on for a long time. go ahead with your question. >> caller: thank you so much. the word "ideology" has come up, but i'm wondering if role of history or the historian has changed. and by that it seems to me there were charges that professors and eggheads had rewritten american history, and now it seems conservatives are rewriting the history i grew up in. [laughter] i'm just wondering, maybe i should say i thought the role of a historian was to try to discover what really happened. but now it seems to be history as a means of furthering an ideological agenda. i wonder if you could comment on that, thank you. >> guest: well with, you and i are of a mind. i mean, i like to write a history that is true to the document that tried to tell the story in it own terms. i read the work of other historians not so much to see if i can make an argument against t