 The influence of the stars was in turn divided into natural astrology, with for example effects on tides and the growth of plants, and judicial astrology, with supposedly predictable effects on people.The fourteenth century skeptic Nicole Oresme however included astronomy as a part of astrology in his "Livre de divinacions".Oresme argued that current approaches to prediction of events such as plagues, wars, and weather were inappropriate, but that such prediction was a valid field of inquiry.