John 18:36 has often been understood to deny that our Lord’s kingdom extends to the realm of earthly politics. But Christian political theorist Alan Storkey offers this correction:
“The short sentence ‘My Kingdom/kingship is not of this world’ has become for many a kind of abstract statement of Christian political otherworldiness. It means, for many, ‘My rule is only spiritual and does not engage politics.’ This text, interpreted in an apolitical sense, has often been the reason for ignoring the political content of the Gospels down the ages, popular especially with secular rulers. We must reflect on whether this interpretation holds up. What does Jesus mean by telling Pilate, ‘My kingdom is not of this world?’ ‘World’ (kosmos) is used with a number of meanings in John–created order, human existence, people as a whole, or sinful world. Within all these meanings, except perhaps the third, which is more colloquial, the engagement of God with the world is paramount. This is not withdrawal language. ‘For God so loved the world’ is typical (3:16). It is false to use the phrase ‘not of this world’ in the sense of withdrawal from politics. Doing so undercuts the Johannine emphasis on God’s relationship with the world and replaces it with a view that withdraws into asceticism. This can be seen from the words we earlier examined: ‘Now is the time for judgment on this world; now the prince [ruler] of this world will be driven out’ (12:31). This is not withdrawal language. Nor is Jesus’ petition: ‘My prayer is not that you take them out of the world, but that you protect them from the evil one’ (17:15). Consequently, ‘My kingdom is not of this world’ and ‘My kingdom is from another place’ are not spoken in withdrawal language.
Jesus is actually talking to Pilate in his pagan terms rather than Jewish or theological ones. He means something like this: ‘My kingdom does not belong to this world. My kingdom is not based on human power, or fighting, or the kind of intrigue that is going on here. It is not like the Roman Empire or the Herodian rule. My kingdom has its roots with God rather than in this evil age. It has a different basis from the kingship that you or the Jews are discussing.’” — Alan Storkey, Jesus and Politics, p. 268.