Final answer:
W.B. Yeats was the writer who sought to create a uniquely Irish literature and was involved in the Irish independence movement.
Step-by-step explanation:
The individual who endeavored to write a uniquely Irish kind of literature and was actively involved in the movement to liberate Ireland from British rule was W.B. Yeats. William Butler Yeats was not only an influential poet but also a staunch supporter of the Irish independence movement. His literary works directly addressed the social and political issues of the time, as seen in his poem 'Easter, 1916', which references the significant event of the Irish uprising against British rule during Easter week in 1916. This piece of history is crucial for understanding Yeats's literary contributions and motives. Yeats's literature was a form of societal discourse that commented on and was influenced by the cultural conditions of his time, often reflecting resistance to the power structures imposed by British rule over Ireland.