[L]iberalism is... a protection of human autonomy. - Francis Fukuyama

[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.

I have a broad definition... Liberalism is a doctrine that was developed in the middle of the 17th century, at the end of Europe's wars of religion, in which a number of early liberal thinkers... said we need to lower the aspirations of politics, not to seek after "the good life" as defined by a particular religious doctrine, but simply to protect life itself by cultivating a virtue of tolerance, whereby, at that time Protestants and Catholics, but... today maybe and could live together peacefully, allowing each to individually choose... what to believe, what to speak, and the like. It believes that all human beings are endowed with a certain basic level of dignity that is equal among all those human beings, and it is institutionalized through a rule of law, by constitutional provisions that prevent the excessive power of the state to limit individual choice. It's not necessarily associated with a particular economic ideology, except that it does protect private property rights... [S]o you can have an expansive social democratic government, like in Sweden or Denmark, or you can have a more limited one like in the United States... [T]hose are all... liberal societies because of that commitment to rule of law.

[L]iberalism... has a left of center meaning in the United States. It has a slightly right of center meaning in much of continental Europe.