Spinoza’s extraordinary views on freedom have never been more relevant. In 2010, for example, the United States Supreme Court declared constitutional a law that, among other things, criminalized certain kinds of speech. The speech in question need not be extremely and imminently threatening to anyone or pose “a clear and present danger” (to use Justice Oliver Wendell Holmes’ phrase). It may involve no incitement to action or violence whatsoever; indeed, it can be an exhortation to non-violence. In a troubling 6-3 decision, Holder v. Humanitarian Law Project, the Court, acceding to most of the arguments presented by President Obama’s attorney general, Eric Holder, upheld a federal law which makes it a crime to provide support for a foreign group designated by the State Department as a “terrorist organization,” even if the “help” one provides involves only peaceful and legal advice, including speech encouraging that organization to adopt nonviolent means for resolving conflicts and educating it in the means to do so.