Edmund Burke, the irish statesman remembered chiefly for his support of the American Revolution and his clearly stated opposition to the French Revolution, wrote a piece entitled Reflections on the French Revolution in which he laments the loss of civility (to put it mildly) on the part of those responsible for the wanton slaughter. Reading Burke it is easy to see why he is considered the father of modern Conservatism, and a representative of classical liberalism, which is the same thing. There are several indications of his strong preference for Conservative principles throughout the piece, but one particularly stood out.
Here's the quote:
"When ancient opinions and rules of life are taken away, the loss, cannot possibly be estimated. From that moment we have no compass to govern us; nor can we know distinctly to what port to steer."