If you want an interesting dark view, try Blindsight by P. Watts. It's SF, but it's 10+ hard on Mohs scale of SF hardness, with 100 references to papers in the end. Contains a number of, mmm, interesting social vistas.

Copyright 2009

The Next 100 Years: A Forecast for the 21st Century https://www.amazon.com/dp/0767923057/ref=cm_sw_r_cp_api_e-6u...

No, but give me 50 years and I'll tell you a good one.

Well if you believe Kurzweil, we'll have achieved a technological singularity by that point.

Since another replier gave a book for 100 years, here's one of those... http://ageofem.com/ Though I imagine 50 years has a small but non-zero probability in Prof Hanson's distribution, and he's pretty careful of not seeming overly certain: "Conditional on my key assumptions, I expect at least 30% of future situations to be usefully informed by my analysis. Unconditionally, I expect at least 10%."

I know it's a bit further out than 50 years, but I remember enjoying this book/series of essays that discusses what humanity could look like in 1,000,000 C.E.

Year Million: Science at the Far Edge of Knowledge https://www.amazon.com/Year-Million-Science-Edge-Knowledge/d...

Not quite the timescale you asked for, but The World in 2050 by Laurence C. Smith was an interesting read. At the time of writing he was predicting things about 40 years ahead.

Limits to Growth, the 30 year update, if 2004 is recent enough.

https://www.amazon.com/Limits-Growth-Donella-H-Meadows/dp/19...