Increasing interest has been shown in recent decades in matters relating to ecology, especially under the influence of the debate on climate change. The scope of ecology is, of course, much wider than that of climate alone, and involves in addition not only human relation with all species of animals and plants but also those conditions of human societies (material and intellectual) that influence our responses to the opportunities and challenges posed by nature. It is with this wider sense in mind that the history of ecology has been treated in this volume. Extensive extracts from sources have been provided; and there are special notes on ecology, climatology, zooarchaeology, natural history, and forestry.