Complex sentence: All of the Wilder children spent part of their childhood in China because his older brother, Amos Niven Wilder, was Hollis Professor of Divinity at the Harvard Divinity School, a noted poet, and foundational to the development of the field of theopoetics.
Split into simpler sentences: All of the Wilder children spent part of their childhood in China. His older brother, Amos Niven Wilder, was Hollis Professor of Divinity at the Harvard Divinity School, a noted poet, and foundational to the development of the field of theopoetics.