Murphy’s Law . . . you know the one that goes ‘If anything can go wrong, it will’ . . . so named after Capt. Edward A. Murphy, a US Air Force Engineer. While working on one of Murphy’s assigned projects, a technician flubbed the wiring. The good captain cursed the man and said, "If there is any way to do it wrong, he'll find it." Shortly afterwards, aerospace manufacturers began using it during their ad campaigns and Murphy's Law was born.
Murphy’s Law . . . such that is . . . is an adage that has been around for hundreds of year. Long before Murphy’s grandfather’s grandfather was a sperm waiting to meet an egg. Good thing the law didn’t apply to him or Murphy may never have been around to make the phrase famous.
Anyhoo . . . before it was Murphy’s Law, it was more commonly known as Sod’s Law; especially across the pond. When someone is unlucky they are often referred to as an unlucky sod . . . hence Sod’s Law.
Of course, things have been going wrong since the beginning of time. I’m sure there was a precursor to Sod’s Law.
In modern times, there are Finagle’s Law, Hanlon’s Razor, and Hofstadter's law; which all pretty much add up to the same thing . . . similar ideas, different viewpoints. But I think my favorite may be Sturgeon’s Law. So called after Sci-fi writer Theodore Sturgeon who stated "ninety percent of everything is crap" . . . yeah, that pretty much sums it up.