Sentientism discussion

I have been reading a few articles and posts that I have found to be great "primers" for studying and learning about the fundamental issues, definitions and bases of Sentientism:

Ludwig Raal's article:
Progress, Animal Welfare, and Our Moral Circle
 
Jamie Woodhouse Jamie Woodhouse's site and articles:  
Sentientism – Raising Awareness
and
Humanism Needs an Upgrade: The Philosophy that Could Save the World

In addition to substantial readings, Jamie lists the various online groups where people can follow along including ones on twitter, reddit, etc.
 
Do you have more? Please share, and thank you!