> the Trans-Atlantic Trade was a sui generis world-historical event, at a whole new scale (by percentage perhaps the largest forced movement in human history)
Wrong. The Arab slave trade [1] exceeded the Western one both in scale [2] and in cruelty [3].
[1] https://en.wikipedia.org/wiki/Arab_slave_trade [2] https://www.quora.com/Who-did-most-of-the-slave-trade-Europe... [3] https://www.quora.com/Was-the-Arabic-slave-trade-more-humane...