“Does anyone not have any problems with taking ideas seriously? I think I'm in this category because ideas like cryonics, the Singularity, [unfriendly artificial intelligence], and Tegmark's mathematical universe were all immediately obvious to me as ideas to take seriously, and I did so without much conscious effort or deliberation.”

1977
The First Three Minutes (1977; second edition 1993)

"On the Philosophical Problems in Quantizing Macroscopic Objects"(ca. 1962-1963) as quoted by Morinigo, Wagner, & Hatfield, Feynman Lectures on Gravitation (2002)
Context: This is all very confusing, especially when we consider that even though we may consistently consider ourselves to be the outside observer when we look at the rest of the world, the rest of the world is at the same time observing us, and that often we agree on what we see in each other. Does this then mean that my observations become real only when I observe an observer observing something as it happens? This is a horrible viewpoint. Do you seriously entertain the idea that without the observer there is no reality? Which observer? Any observer? Is a fly an observer? Is a star an observer? Was there no reality in the universe before 109 B. C. when life began? Or are you the observer? Then there is no reality to the world after you are dead? I know a number of otherwise respectable physicists who have bought life insurance.

2010-, I have to speak for people who are afraid, 2010

Source: Trent's Own Case (1936), Chapter XXI: "Aunt Judith Knits"

Blue Like Jazz (2003, Nelson Books)

23 November 2018 https://twitter.com/RichardBSpencer/status/1066238599253843968 regarding Andrew Yang, highlighted 11 March 2019 by Vox https://www.vox.com/2019/3/11/18256198/andrew-yang-gang-presidential-policies-universal-basic-income-joe-rogan and 10 April 2019 by Mother Jones https://www.motherjones.com/politics/2019/04/andrew-yang-4chan-alt-right/
2018