But there is plenty of good science fiction that explores the idea of life being engineered by a super intelligent race of aliens. One of my favorite is Childhood's End, by Arthur C. Clarke, published in 1953:
Have you, by any chance, read this book: Aliens: The Final Answer? a Ufo Cosmology for the 21st Century by David Barclay http://www.amazon.com/Aliens-Final-Answer-Cosmology-Century/dp/0713724986/ref=sr_1_1?ie=UTF8&s=books&qid=1207595619&sr=8-1