Back when I was a kid, they made Tonka trucks out of steel. By God American steel. You would not drop a Tonka truck on your head more than once; you would either die from a crushed skull or, if you were lucky, you would learn that 20 pounds of steel hurt when dropped, and you would not to do it again.
But since we've gotten all of these Consumer Product Safety Commissions now that mandate that childrens' toys can't weigh more than 4 ounces in case someone decides to drop one on their head, they now make Tonka Trucks out of plastic. As a result, the bottom of the human gene pool are being protected from themselves. Dumb people who would have, in times past, killed themselves off long ago are now, by virtue of "safer toys", reaching adulthood - and worse, producing offspring. This results in the Dumbing Down of America. Think of it as a fork in Darwin's eye.
Survival of the Fittest has been replaced with Survival of Them All, Including Idiots, with the added benefit that kids get shittier toys to play with now than when I was a kid. My son's Little People Pirate Ship has a frickin' smiley face and two pieces of knotted rope instead of the Jolly *!@#@$% Roger. God help us all.
And the Tonka Truck Theory has been in development for 10+ years now.