Just Added "The Dumbest Generation" to My Amazon Wish List

I've been wondering if the population at large is getting dumber in general over time and it sounds like The Dumbest Generation: How the Digital Age Stupefies Young Americans and Jeopardizes Our Future may have evidence that is indeed the case. I also wonder how this generation or century compares to previous eras in terms of intelligence distribution throughout the population - would love to see some stats on that.

Quote from Can U Read Kant? - WSJ.com:

"Naomi Baron, in her recent book, 'Always On: Language in an Online and Mobile World,' cites the NAEP to note that 'only 24% of twelfth-graders are 'capable of composing organized, coherent prose in clear language with correct spelling and grammar.'"