I love this! I'm so glad you commented on my first post and that I checked out your blog, I've been looking for content like this to support.
Anthropogenic climate change and our current mass extinction is a topic that needs more attention. And the important thing to remember is that although humans caused these problems, humans can also find solutions for them!
Habitat fragmentation - what you were talking about with humans unknowingly separating species - can be solved buy building habitat corridors, like wildlife passes above busy freeways.
You also mentioned hybridization, which is a sad issue because since it takes generations to see effects, it oftentimes goes unnoticed. But the more people that know about these problems, the higher chance we have of fixing them.
There are so many more topics you brought up that I want to discuss, but first I should go check out parts 1 and 2, huh?
Haha, thanks for a great post!