Which theme best reflects the ideals of modernist writers

Even though change may be painful, it is inevitable.

Explanation:

learning how to embrace the effects of colonialism is one of the central ideas of the play.

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.