However, if you consider liberty as a social construct that means you're allowed to do things as defined by society In fact, you have just demonstrated that li

However, if you consider liberty as a social construct that means you're allowed to do things as defined by society In fact, you have just demonstrated that liberty can't exist permanently as a social construct. Therefore, liberty needs to be based on something apart from and beyond society. For example, we could have a society which is based on universal and inviolate principles of personal liberty. (The United States gets laudably close to it.) There are things which are beyond social constructs, like math, science, and nature. People who claim otherwise are just trying to use a social construct to get you to act as if all those other things are ours to define arbitrarily, because ultimately they want to have power over you and other people. (EDIT: The fact that the US and Britain have had something like universal principles of individual rights is precisely what allowed societies to eventually reject their socially constructed acceptability of slavery. So also beware of people who advocate reducing or infringing on individual rights. We know that things like freedom of speech, property rights, and judicial due process are important for liberty, precisely because in the historical record, authoritarians have suppressed speech, taken property, and manipulated judicial processes to squash political opposition.)