In modern times sound policy-making must often come to grips with numbers.
Active liberty is particularly at risk when law restricts speech directly related to the shaping of public opinion, for example, speech that takes place in areas related to politics and policy-making by elected officials. That special risk justifies especially strong pro-speech judicial presumptions. It also justifies careful review whenever the speech in question seeks to shape public opinion, particularly if that opinion in turn will affect the political process and the kind of society in which we live.
The main principle of groupthink, which I offer in the spirit of Parkinson's Law, is this: The more amiability and esprit de corps there is among the members of a policy-making ingroup, the greater the danger that independent critical thinking will be replaced by groupthink, which is likely to result in irrational and dehumanizing actions directed against outgroups.