Among other things, this stat below is a good enough reason to be able to call him one of the very best ever.

Robinson won his first 40 professional fights before losing to Jake Lamotta on Feb 5th 1942, Robinson then went unbeaten in his next 91 fights

Think he won about 89 Amateur fights in a row before this too with 109 pro KO's

Shame there's limited footage of him but if you listen or read up on people from that era (Burt Sugar etc) they all say the same thing, that he really was that good