Young children today sleep less and go through more transitions in a day than in previous generations. The result of this reality, along with many other social changes, has created concern around what is being called the "adultification" of childhood. Taking a look at this trend and what can be lost when rushing little ones to be mini-adults rather than letting them be children for the entirety of their childhood is Erika Christakis. https://www.edutopia.org/article/whats-lost-when-we-rush-kids-through-childhood. She is the author of the highly recommended: The Importance of Being Little: What Young Children Really Need From Grownups.