Introduction:
The Sadharan Brahmo Samaj was a religious reform movement founded by Anandamohan Bose and others in 1878. It was a breakaway faction of the Brahmo Samaj, which had been founded by Raja Ram Mohan Roy in 1828.

Reasons for founding:
The Sadharan Brahmo Samaj was founded in response to growing dissatisfaction with the Brahmo Samaj's emphasis on monotheism and rejection of all forms of idol worship. The founders of the Sadharan Brahmo Samaj believed that the Brahmo Samaj had become too rigid and dogmatic, and that it was time for a new movement that would be more inclusive and tolerant.

Beliefs and Practices:
The Sadharan Brahmo Samaj rejected the rigid monotheism of the Brahmo Samaj and instead embraced a more liberal and inclusive approach to religion. They believed that all religions were valid and that people should be free to worship in whatever way they chose. They also rejected the traditional caste system and believed in the equality of all people.

Activities and Contributions:
The Sadharan Brahmo Samaj played an important role in promoting social reform in India, particularly in the areas of women's rights and education. They established schools and colleges for both boys and girls and encouraged women to take an active role in society. They also fought against child marriage and other forms of social oppression.

Conclusion:
The Sadharan Brahmo Samaj was an important religious reform movement in India that helped to promote social reform and equality. Although it was a breakaway faction of the Brahmo Samaj, it played an important role in shaping the religious and social landscape of India in the late 19th and early 20th centuries.