Response to your lectures on messianism

Hello,
I recently discovered your philosophy, and it makes me very happy. As a new immigrant, I thought that only abroad did rationalist (even extreme) thinking exist with orthodox (or more precisely, orthopraxic) observance of the commandments. I was pleasantly surprised to see that it did not.
For our purposes, I saw your series on messianism and I must say that there is a central thing that you never get into, and that is what is the precise definition of messianism and redemption? In my opinion, this flaw in the entire series makes all the discussions there peripheral and fail to properly decipher the problematic.
So I ask this here: What is the definition of redemption in your opinion? Are Messiah and redemption synonymous? And according to these definitions, is it possible to diagnose our reality and give it a halachic definition?
 
Thanks in advance.