This book provides comprehensive insights into the field of economics theory. It picks up individual branches and explains their need and contribution in the context of a growing economy. Economics is a science of determining the distribution, consumption and production of goods and services. It also examines the interactions amongst economic agents and studies the functioning of an economy. The book studies, analyses and uphold the pillars of economics and its utmost significance in modern times. The topics included in it are of utmost significance and bound to provide incredible insights to readers. For all those who are interested in economics theory, this text can prove to be an essential guide.