Eric Cline, specifically 1177 BC
https://en.wikipedia.org/wiki/Eric_H._Cline
that the article or the top post here doesn't cite him is unforgivable
Cline talks about, and dismisses, the theory that iron caused the LBA collapse. The timing doesn't work.
I have read Cline's work. He is not the original source of the ideas on bronze to iron transition. This is a very well studied topic in archeological metallurgy.