So why is the liberal idea so much better than the conservative idea?

Because change is the only constant in the Universe! Being resistant to change is not a sustainable ideology; it's like trying to swim up a waterfall; it's contrary to the divine laws of nature; it's disrespectful of the Tao. This is a fact that conservatives just can't, or don't want to, understand. They are pretty shaky on most facts, as a matter of fact, but failing to grasp this one is their Big Mistake... the one from which all the rest of their stubborness and wrongness arises.

The conservative impulse was perhaps best summarized by the crown prince of modern conservatism, William F. Buckley, who proclaimed that conservatives "stand athwart history, yelling, 'Stop!'" Yes, indeed, they do... and, inevitably, predictably, they get flattened. History stops for nothing. Either get on board, or you will be left behind. And that's where conservatives so often find themselves... the train has left the station, and they are not on it. Or worse, they try to block the train and... splat!

You see, the human species could only develop by taking chances, by changing, by innovating, by adapting to new and different circumstances, and by constantly recreating itself... and through this process liberate ourselves from old ways of thinking that were stifling our evolution toward our greater potential. Humans are, in fact, evolution's superstars. Our greatest ability is not that we are bigger, faster, stronger, more ferocious than any other species. It's not even that we have higher intelligence (because that's a relatively new development). But for, oh, about a billion years, our lineage has been the grand-champion at adapting, changing, evolving.