Who is the antagonist in The Mosquito Coast by Paul Tvillianux?

Mosquito Coast, at its heart, is a study of the personality of Allie Fox. Fox shows symptoms of mania, an extended period of increasing impulsivity, talkativeness, poor judgment, insomnia and inappropriate enthusiasm. This mania is exacerbated by the Fox family structure, most obviously the unqualified and occasionally pathological support of Mother.