Complex sentence: Through his political advocacy and the literary success of his friends, Auden and Spender, Christopher Isherwood became something of a literary rock star, immersing himself in sexual experimentation, alcohol, and raucous company across Europe and North America.
Split into simpler sentences: Through his political advocacy and the literary success of his friends, Auden and Spender, Christopher Isherwood became something of a literary rockstar. Immersing himself in sexual experimentation, alcohol, and raucous company across Europe and North America.