To JOIN, click on "Sign in" (you can register with any email address) then click on "JOIN".
I hope you'll want to discuss them. To do so, share it on a social media site such as Facebook or Twitter, and start a conversation.
You may not like social media (and I sympathise) in which case you can discuss the topic in this group, but be aware that it won't get much attention here.
Hope you enjoy the topics.