50,000 A.D. The Awakening

What happens when a person from the 21st century wakes up 50,000 years in the future?

You might say that Henry Matthews is the luckiest man in the universe. By
pure chance, in 2012, his head along with all his thoughts and memories
were protected and preserved, allowing him to stay alive for 50,000
years.

What does this future hold?

Total peace?
Long life?
Enlightened Democracy?
...or something else.

50,000 years in the future

Henry Matthews is about to embark on a journey of great discovery.

What does this future think of him?

Since their own ancient record of human existence only goes back 35,000 years, trillions of people are startled to discover the existence of an unknown ancient history when Henry awakens.
However, some refuse to believe human history is older than 35,000 years, so that could only mean one thing. Henry Matthews must be something other than a human being.

But what?

This novel also tries to establish relationships between 'ancient' and 'new' by comparing a few aspects of the different cultures and languages that you would expect to change over these vast periods of time: does the hero of the story manage to figure out what the new languages he encounters evolved from?

PART 1 - How Henry Matthews finds his way to 50,000 A.D.
PART 2 - How he is discovered and what anxiety and/or thrills it causes in these future societies in both a political and spiritual way.
PART 3 - Henry is revived and his relationship to this new era is exposed.
PART 4 - Opps! sorry no spoilers (but you will be intrigued by what happens).