UPSC CSE Mains Study Material (Free)

By Saroj Singh|Updated : April 10th, 2021

BYJU'S Exam Prep IAS provides you with an updated, crisp and easy-to-read UPSC Main Exam Study Material, which comprehensively covers all the topics and sub-topics mentioned in the UPSC IAS Main Syllabus along with key important contemporary issues. 

Table of Content

In this blog, we have listed below the topics with direct links paper wise and subject wise as well so that you can easily access the content related to every topic of all the GS papers. 

UPSC Main Exam Study Material (GS I + GS II + GS III + GS IV)

Paper-I General Essay

Socio-political Issues 

Challenges of Corruption: Way Ahead

Paper-II: General Studies-I (Indian Heritage and Culture, History and Geography of the World and Society) ….......250 marks

Indian Heritage and Culture 

Mughal Art and Architecture 

Indian schools of Ancient Indian Philosophy 

Important Festivals of India

Modern Indian Architecture 

Civilian Awards and Honours in India


Women Participation In Indian Freedom Struggle 

Ancient Indian Architecture 

Land Revenue System 

Evolution of Civil Services

Role of India in World War-1

Indian Freedom Movement: Socio-Cultural Organisations

Mountbatten Plan(1947)

Chronology of Important Events in Indian History

Education during the British Period

World History

Industrial Revolution
French Revolution-Causes and Consequences

World War I-Causes, Consequences and Impact on India

Russian Revolution: Causes, Consequences and the Impact on world

World War II: Causes, Course of the War and Consequences


Preparation strategy for Geography for UPSC

World Climate Types: Hot Wet Equatorial climate; Tropical Monsoon Climate

World Climate Types: Tropical Marine Climate; Savanna or Sudan climate 

Volcanic Landforms

Continental Drift Theory

Seafloor Spreading Theory

Plate Tectonic Theory 

Interlinking of Rivers

Mangroves in India

Urbanization in India 

Coral Restoration in India

Classification Of Soil In India

Ocean Currents

World Climatic Types

National Disaster Management Authority (NDMA)

El-Nino and La-Nina

Zero Budget Natural Farming

Rainbow Revolution- Need of the hour

Green Revolution: Components, Impact and Way Forward

Diversity in India: Basis; Reasons; Threats and Way Forward

Protected Area network in India: Key highlights 

Paper III: General Studies -II (Governance, Constitution, Polity, Social Justice and International relations) ………….250 marks


Role of Civil Services in Democracy

E-Governance Part 1: Concept, Applications and Models

E-Governance Part-2: Success, Limitations and Potential

15 Years of RTI: Success, Challenges and Way Forward

RTI (Amendment) Act, 2019 and its Impact

Centre-State Relations

The local Government system in India

Delhi Full Statehood Issue 

Electoral Bonds in India 

Gram Nyayalayas in India

Post-retirement Appointment of Judges

Supreme Court on Cryptocurrency

All-India Judicial Services (AIJS)

22nd Law Commission of India

The Feminisation of Indian politics

National Investigation Agency(NIA)

Electronic Voting Machine (EVM) Controversy

Coalition Government In India

Regional parties and Indian politics

Genocide Convention by the United Nations


Basic Structure Doctrine of the Indian Constitution

Strengthening Parliamentary System

Comparison of the Indian Constitutional Scheme with that of Other Countries

Anti Defection Law

Judicial Accountability

Writs In the Indian Constitution

Electoral Reforms in India

Essential Commodities Act

The Arms (Amendment) Act, 2019

Important Amendments in the Indian Constitution

The Motor Vehicle (Amendment) Act, 2019

National Statistical Commission Bill

Important Committees and Commissions in India

Scheduled And Tribal Areas

Social Justice  

Salient Features of Indian Society

Sabarimala Temple Issue 

Triple Talaq Issue: Detailed Analysis

Safety Issue of women in India 

Two child policy in India 

Lifestyle Diseases In India 

Anaemia: A Big Public Health Challenge


Drug Menace in India

Human Migration Issues in India 

Child Adoption in India 

Particularly Vulnerable Tribal Group (PVTG)

Major Tribes in India: State-wise compilation

International Relations 

India-US Relations 

India-Russia Relations

India And Its Neighborhood Relations In Overview 

Why ASEAN is a success, but SAARC is not?

India-China Relations 

India-Pakistan Relations

India-Nepal Relations

Non-Aligned Movement (NAM) 

North Korean Crisis 

Nuclear Doctrine of India 

Important International Economic Organisations

US-Iran tensions

India's Space Diplomacy

Hongkong Protest

Blue Dot Network

Paper IV: General Studies -III (Technology, Economic Development, Biodiversity, Environment, Security and Disaster Management).............250 marks

Economic Development 

Strategy - How to Prepare Economics for UPSC

Overview of Indian Economy

IPR and Related Issues

Agriculture In India 

Land Reforms in India 

 Issues related to direct and indirect farm subsidies 

Minimum Support Price (MSPs) 

Issues Of Buffer Stocks 

Indian Economic Slowdown 

Investment Models 

Privatisation of Indian Railways 

Contract Farming in India

Blue Revolution in India

Public Distribution System in India

Global Crude Oil Prices Crash 

Money Market Overview

E-Commerce in India

15th Finance Commission of India 

Mega food parks in India

National Infrastructure Pipeline (NIP)

Dedicated Freight Corridors

Drug Pricing Policy in India

Yes Bank Crisis & Reconstruction Plan

Public Sector Undertakings(PSUs) in India

Food Processing in India

Merger Of Banks in India

Strategic Disinvestment of PSUs

Strategic Petroleum Reserve In India

Introduction to Financial Market

LPG Reforms in India

Taxation in India: Direct Taxes and Indirect Taxes

Inclusive Growth in India

Co-Lending Model by Banks and NBFCs for Priority Sector

Industry 4.0: Benefits and Challenges

Industrial Policies in India

Industrial Policies in India Part-2

Special Economic Zones (SEZ) Act

Fiscal Responsibility and Budget Management (FRBM) Act

Science and Technology 

Relevance of post-vaccination serosurvey

Antibiotic Resistance

Space Telescopes

Nuclear Power Plants in India

Artificial Intelligence

5G Technology

Artificial Intelligence: A modern approach; Applications & Examples

Antimicrobial Resistance (AMR)

IndiGen Project

Scramjet Engine Technology

Indian Space Station: Benefits and Challenges

Fuel Cell

Microbial Fuel Cell

MANAV - The Human Atlas Initiative

Vaccines and Immunization: Covid-19 Vaccine Development

Emerging Technologies and the Global Challenges


Biodiversity: Types, Importance and Conservation

IUCN Red List of Threatened Species 

Protected area network in India

Coral Restoration in India


Ban on Single-use plastics

Environmental Conventions and Agreement 

Bharat Stage Norms

13th CoP of Bonn Convention

Indian State of Forest Report, 2019 (ISFR)

Air Pollution in Delhi

Environmental Legislation in India (Part-1)

Environmental Legislation in India (Part-2)

Australian Bushfire Crisis

Aerosols and its impact on Climate

E-Waste in India

Renewable Energy


Challenges in North-East India 

Naxalism in India

NRC In Assam And Its Possibility In India 

Linkages Between Development and Extremism 

The Jammu and Kashmir Issue 

Cyber Security in India 

Chief of Defence Staff (CDS) 

Bodo Peace Accord 2020 

List of Joint Military Exercises of India 2019-2020 

Central Armed Police Force (CAPF)

Cluster Containment Models: Agra, Bhilwara and Pathanamthitta

Disaster Management  

Paper V: General Studies -IV (Ethics, Integrity and Aptitude) ……….250 marks

Overview of Ethics Theories

Virtue Ethics

Ethics: Deontology- Kant Philosophy

Teleological Ethics or Consequentialism


What is Ethics? And different dimensions of Ethics

Descriptive Ethics and Lawrence Kohlberg's Moral Reasoning

The Seven Principles of Public Life with Examples

Code of Ethics and Code of Conduct

Challenges of Corruption: Way Forward

Applied Ethics

Ethical Dilemma: Some examples

Role of Family in inculcating values

Paper-VI: Optional Subject - Paper 1………………………….250 marks

Paper-VII: Optional Subject - Paper 2 ………………………….250 marks

A thorough understanding of key concepts and their integration with current affairs (latest updates) is essential for cracking the UPSC exam. Keep visiting the blog as the topics will be updated regularly for UPSC IAS Main examination purpose. 

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