It's been happening for ages, mainly through the use of pathogens (along with various other deadly chemicals) infused into our food and water. That, combined with an endless amount of propaganda and the convenience attached to nearly everything we do in our daily lives, has led many to peak laziness and a growing inability for critical thinking. Given all this, the typical person's diminishing brain function seems unsurprising, doesn't it🤷‍♂️? 

 Forgot to mention medications. How could I forget about those?