Here’s a schematic causal analysis of one event, exploring the difference among precipitating, necessary, and sufficient causes. Critique and revise the analysis as you see fit. Then create another of your own, beginning with a different event, phenomenon, incident, fad, or effect.

Event: Traffic fatality at an intersection
Precipitating cause: A pickup truck that runs a red light, totals a Prius, and injures its driver
Necessary cause: Two drivers who are navigating Friday rush-hour traffic (if no driving, then no accident)
Sufficient cause: A truck driver who is distracted by a cell-phone conversation