Nonsense. Ska came first.
Urban legend that reggae came about when it was too damn hot to play and the ska musicians slowed down.
Ska/reggae have accents on the second and fourth beats and you may notice this influence on New Orleans music. Those in NOLA could hear music from Caribbean radio stations...
Dr John Junko Partner
https://www.youtube.com/watch?v=BqfH_1xCSME