We gathered >1 million human correlations spanning personality, demographics, behaviors, and beliefs, which enabled us to investigate an interesting question: is everything correlated with everything? In other words, is the so-called "crud factor" real? Here's our answer. On average, there is almost no correlation between human variables (see image). The average is only r=0.02, with the median even smaller at r=0.01. But this is misleading because it allows positive correlations to be cancel...