graph TD A[Railways introduced in India by British in 1853] --> B[Network of railway spread from north to south and east to west] B --> C[Railways eased movement of people, goods, books and ideas across the country] C --> D[Railways facilitated the spread of nationalist and social reform movements] C --> E[Railways increased the contact and communication between different regions and people] C --> F[Railways exposed the exploitation and discrimination of British rule] D --> G[Railways helped in the formation and functioning of Indian National Congress] E --> H[Railways fostered a sense of unity and common identity among Indians] F --> I[Railways stimulated the demand for self-government and independence]