Raja Rammohan Roy and Rabindranath Tagore, both prominent figures in Indian history, shared several ideas in common. One of these ideas is internationalism, which emphasizes the importance of cooperation and understanding among different nations and cultures. Both Roy and Tagore were known for their global outlook and their efforts towards establishing international relationships.

Another shared idea between the two is opposition to idol worship. Both Roy and Tagore were critical of the traditional Hindu practice of idol worship and advocated for a more rational and inclusive approach to religion. They believed in the power of reason and intellectual inquiry, rather than blindly following religious rituals.

Furthermore, both Roy and Tagore had faith in rational and scientific approaches. They believed in the power of knowledge, education, and scientific progress to bring about positive change in society. They emphasized the importance of reason, logic, and critical thinking in shaping a better future for the people.

In conclusion, all of the above ideas were shared by Raja Rammohan Roy and Rabindranath Tagore. They both believed in internationalism, opposed idol worship, and had faith in rational and scientific approaches.