How often do you see people trying to recreate the lifestyles or belief systems of extinct cultures / societies for themselves to live by in a genuine day to day manner, and not in a academic or archeological capacity?

The content of their belief system might be known and recorded in that scenario but the teaching of it as a genuine belief/truth to live by and to be passed on from generation to generation probably wouldn't be.

Isn't that basically what neopaganism is?