Modernism was a time of declaring one’s principles via a manifesto:
http://writing.upenn.edu/library/Blast/Blast1-1_Manifesto.pdf
https://www.poetryfoundation.org/poetrymagazine/articles/58900/a-few-donts-by-an-imagiste
https://greenwoodenglish.files.wordpress.com/2017/04/imagism-manifesto-imagist-cluster.pdf
