One week after voting to leave the EU, Britain has seldom looked so wildly off the rails
Regarded as a whole, Mann's career is a striking example of the "repeated puberty" which Goethe thought characteristic of the genius. In technique as well as in thought, he experienced far more daringly than is generally realized. In Buddenbrooks he wrote one of the last of the great "old-fashioned" novels, a patient, thorough tracing of the fortunes of a family.
off the rails. (idiomatic) In an abnormal manner, especially in a manner that causes damage or malfunctioning. (idiomatic) Insane. If someone has gone off the rails, they have lost track of reality.
puberty noun [U] ━━ n. 性的成熟（期）, 思春期, 年ごろ.
the stage in a person's life when they develop from a child into an adult because of changes in their body that make them able to have children:
At puberty, pubic hair develops and girls begin to menstruate.
describes someone who is at the stage in their life when they are developing from a child into an adult and becoming able to have children: