All of Proto-Indo-European in less than 12 minutes
PIE-- the largest and most diverse offshoot from Proto-World. As there are a lot of people who don’t know linguistics, I was being very facetious there. “Proto-World,“ the idea that all language share an ancestor, is a very naive theory that has next to no supporting evidence. And Indo-European languages are certainly not the most diverse language family- even though they might be the most widely spoken, both in terms of area and population. This description is falling apart. Okay
Sources:
~kroch/courses/lx310/handouts/handouts-09/ringe/
~rnoyer/courses/51/