The Sixth Mass Extinction: fact, fiction or speculation?

[mapuc]

I thought this could be an interesting discussion-
Are we the human behind the 6th mass extinction ?
As claimed by some in the following article

There have been five Mass Extinction events in the history of Earth's biodiversity, all caused by dramatic but natural phenomena. It has been claimed that the Sixth Mass Extinction may be underway, this time caused entirely by humans.

https://onlinelibrary.wiley.com/doi/...1111/brv.12816

I personally wish that the text wasn't so compact.

Markus