Only time at the moment to connect a couple of references that relate to Epicurus views on causation and what (if anything) is "causless," which relates to attacks that some make against Epicurus when they allege that the swerve, being "uncaused," is ruled out of court.
Below is a Ciceronian discussion of Epicurus' views. I would suggest at some point we compare this to the way Frances Wright discusses Epicurus' view (responds to this argument?) in A Few Days In Athens: