The phrase "pervasive theme" means a recurring idea or concept that is present throughout a particular thing, situation, or piece of work. It is something that is constantly seen, noticed, or felt in various aspects of that thing. Full definition
The other pervasive theme is the mental illness that seems to have haunted his family. (bookpage.com)
One of the most pervasive themes in Altizer's writings is what he discovered in his study of Blake and Nietzsche: A prophetic hatred of memory.32 With Nietzsche the aversion to all past events is shown in his condemnation of the «It was.» (religion-online.org)
One of the most pervasive themes of mujerista theology is the preferential option for the poor and oppressed. (religion-online.org)