A further threat to liberalism has to do with the mode of cognition that we call modern natural science. The early liberals were very closely aligned with the founders of modern natural science, people like Bacon and Descartes and Newton, who believed that there was an objective world beyond our subjective consciousnesses, that we could perceive this world through the experimental method, and then come to manipulate it. Natural science gave us technology... that made the world much more habitable, by conquering disease, by inventing things that vastly increased human productivity. So... it's closely related to the wealth, and... the safety and comfort of a modern economically developed world.