Google Sets automatically create sets of items from a few examples.
Today I punched in the words Rainbow Family, One Family Gathering, Freedom, Law, and Action into it. The results...

freedom, law, action, politics, blogging, rights, media, terrorism, blogs, constitution, bush, activism, censorship, war, government, reference, journalism, liberty, iraq, web, video, privacy, security, congress, military, legal, technology, information, democracy, copyright, nsa, terror, community, usa, on, china, elections, opinion, civil, religion, free, revolution, patriotism, process, google, research, protest, corruption

Something to think about.