### Political identity

is limited to the twelve most common responses: IPA, anarchist, centrist, conservative, democrat, doesn’t care, hates politics, independent, liberal, libertarian, republican, and very liberal. These are heterogenous categories from an open-ended question. No work was done to limit labels to political parties (eg. remove “doesn’t care”), disambiguate misspelled or similar responses (eg. combine “anarchy” and “anarchist” or “liberal” and “very liberal”), or limit responses to one country. To produce the word list for Liberals and Conservatives in Table \[words\_rel\_pol\], we combine “liberal”, “very liberal”, and “democrat’’ as well as “conservative”, “very conservative”, and “republican”. The most likely meaning of IPA is the Independence Party of America, which was in its nascence during this survey. The party is most popular among young people disaffected by the two party system, a sentiment reflected by the users who report IPA.

### Religion

categories were limited to the nine most common responses, and similar labels were combined. Three variants of Catholic—“catholic”,“christian-catholic”, and “romancatholic”—were merged to form Catholic. Likewise, Christian refers to “christian”, “christian-baptist” and “christian-evangelical”. The entire list includes: Atheist, Agnostic, Catholic, Christian, Hindu, and None.

### Belief in star sign

is the user’s response to “Horoscopes provide useful information to 