I was just thinking about the “Everything is fine” delusion in terms of why people on SSRIs are unrealistic. When we naturally have serotonin released onto our neural receptors, it’s because of positive stimulation in the real world, and we form an association between happy real events and happy feelings. SSRIs continue the happy feelings unnaturally for an extended time, by blocking the reuptake of the serotonin so that it just stays on the neural receptor indefinitely. The subconscious mind realizes that not enough positive stimulus has occurred in the real world to justify feeling this happy all the time, so it creates an alternative reality where “everything is fine”. If you point out to such a person that there is real negativity and there are real threats in the real world, the person’s happy fantasyland will feel intruded upon, and the person can become agitated and defensive. That’s when the ‘paranoid conspiracy theorist’ accusations come out.