Deus Ex was originally released in 2000 but took place in an alternate 2052 where many of the real world conspiracy theories have come true. The plot included references to vaccinations, black helicopters, FEMA, and ECHELON amongst others, some of which have connotations to real-life events.
Spector said, “Interestingly, I’m not sure I’d make Deus Ex today. The conspiracy theories we wrote about are now part of the real world. I don’t want to support that.”
Earlier, Spector had commented on how he was “constantly amazed at how accurate our view of the world ended up being. Frankly it freaks me out a bit.”
https://www.playstationlifestyle.net/2021/03/16/warren-spector-conspiracy-theories/
He also likes to take credit but he was "only" gameplay designer (working on his idea since 1994, when it was Project Troubleshooter). The game was written by some guy who then didn't write anything else.