No, not really. It more likely stated some forms of some of the beliefs, putten in a song form. There were different forms. Literature for illiterate societies: Folk songs, liturgical Hymns, recited stories and poems, for Theaters (for entertainment) jokes, and Proverbs. Western Church literature: Liturgical hymns, stories and sermons, prayers, poetry. Some people alternated the folk songs. And then over time, the version of the song that is sung, is far from the original version of the song. Time and age could change what a person thinks, acts, speak, etc… they even could take a completely different meaning from a song than someone, because of time and age. Some songs are about sin flourishing in darkness. Some are about light conquering darkness. Some of the songs that they call hymns are about some beliefs.
For example: Mary, the ‘birth/earth’ mother of Jesus Christ, changed man’s grief to glory. And that she is our mediator and advocate between us and Christ, and that Christ is the mediator and advocate between us and God the Father, with Mary between us and Christ; When she bore Christ, she became Sin free; And there are some victories that Christians had made, and the hymn(s) state that the victories came to be, because of the Resurrection; And then you get hymns, saying that this person needed these people, and another person needed someone and the person who needed these people. And the list continues. (end of Examples).
So… “Did this literature encourage Christians to exercise political leadership?” NO (well to me anyways). Most of the hymns just stated some of their beliefs. The other hymns, told different stories, principles, and the occasionally Folk song. None of which, I have read, have/had to do anything with ‘political leadership’.