"The Destructors" delves into the theme of changing power dynamics. Initially, Blackie leads the gang and proves to be an effective leader. Although he promotes mischief, it remains harmless and non-destructive. Under his guidance, power is defined as the ability to lead others. However, when T. takes charge, the gang undergoes a significant transformation. He convinces the members to participate in a vicious plan to demolish an innocent man's house, a valued symbol of England’s heritage. In T.'s leadership, power is redefined as the capacity to destroy. His approach contrasts with Blackie's; when Blackie arrives on the first demolition day (following T.'s leadership takeover), "He had at once the impression of organization, very different from the old happy-go-lucky ways under his leadership." On the second day, when Summers suggests doing something more enjoyable, T. rejects the idea. T. realizes he wields more power than Summers and reminds him that the task is incomplete and that Summers himself voted for the project. He effectively coerces Summers into staying to help finish the destruction.

Within this small community, the social structure is experiencing a shift in power dynamics. The boys are aggressively asserting control, wielding significant influence. They possess the ability to change lives and instill fear. Meanwhile, Mr. Thomas clings to an outdated sense of authority that no longer exists. He mistakenly believes he commands respect and obedience, rooted in the old social order where elders like him were honored. The power shift depicted in "The Destructors" underscores this changing social hierarchy and hints at a concerning outlook for the future.