Complex sentence: On his home world of Illium, he owned millions of trees with "anti-gravity wood" from which starships such as his own were constructed., renounces his privileged position in the Empire Galaktika in opposition to the Empress's policies and cruelties.
Split into simpler sentences: On his home world of Illium, he owned millions of trees with "anti-gravity wood" from which starships such as his own were constructed. He renounced his privileged position in the Empire in opposition to the Empress's policies and cruelties.