What's with all these people who think only an extreme ideology is the way forward? People are flawed, not only does this mean all these misty distant utopias are impossible to achieve but also that it is unlikely anyone will ever devise one that takes this into account, no one is ever going to have the answer to all our problems.
A practical political philosophy therefore must take into account the fact that the people using it are fallible and will make mistakes, but this is not enough. Someone who never knows when they are right will err and flip flop constantly as circumstances change, to solve this problem we need to take a look at scientific method which is also based on fallibility, just as a scientist must be willing to listen to new ideas but only accepts them once they have been rigorously tested it should be the same for politics. This is still not enough however, what I have done thus far is exactly the same as all the commies and fascists before me, create a rule book and expect people to follow it, I need to accept the fact that the people I need to make this work aren't going to stick to empty platitudes, they will only stick to what they know.
People are familiar enough with moderation and conservatism, therefore this is the best political philosophy to support.