"Diversity" is empty HR speak, please specify which kind of diversity fosters innovation.
To keep an open mind I did a thought experiment and found a few: entertainment, fusion food, music, those things I'd imagine benefit greatly from diversity.
I'm talking about the diversity of WW2 era Germany bringing, through great atrocity, a means for the world to not starve via nitrogen sequestration derived by the tragedies of the holocaust and the Haber Method.
It is not the prettiest example, but it fits what you've asked for.
- There was diversity
- As a result, there was innovation.
This disregards a LOT of bad things that came from this, and it doesn't validate or excuse those bad things, however it fits the stipulations of what you outlined: a time where diversity created innovation.
[EDIT] wow, you edited your whole long form reply and just replaced it with "I'm not a bot"? That's such a misleading and dishonest thing to do for everyone reading these posts from now onwards
If you hire all of the same socioeconomic strata even if they are different races chances are you will not get a wide depth of experience and world view