Cause X
Cause X refers to a hypothetical cause that is extremely effective but currently unknown.1
https://www.google.com/search?q=%22cause%20X%22%20%22effective%20altruism%22
https://www.effectivealtruism.org/articles/three-heuristics-for-finding-cause-x/
“Why it’s a bad idea to break the rules, even if it’s for a good cause”. 80,000 Hours. Retrieved June 30, 2018.↩