Literature refers to any written work and is considered the mirror of society, reflecting cultural norms, traditions, and experiences. World literature looks at these works in a global context, considering the circulation of literature beyond its country of origin. The document then provides an overview of the major periods of literature from Old English to the present day, noting some defining works and characteristics of each era. It also discusses the contributions of Indian writers to world literature through works like the Mahabharata, Ramayana, and Bhagavad Gita which have shared India's rich cultural heritage globally.