Keith Hayward's Infantilised: How Our Culture Killed Adulthood explores the pervasive societal trend of infantilisation, arguing that it's not a niche issue but a widespread cultural phenomenon impacting various aspects of life. The book examines how this trend manifests in popular culture, education, and politics, citing examples ranging from childish advertising campaigns to the behavior of political figures and protesters. Hayward analyzes the roots of infantilisation, tracing its origins back to the 1950s and its evolution through the counterculture movement and the rise of digital media. He also discusses the related concept of adultification, where children are treated as adults, and explores the consequences of this blurring of life stages for society. Finally, Hayward offers potential solutions for reversing this trend and fostering a more mature society.