What movement aimed at uniting Christians?

The movement that aims at uniting Christians is ecumenism. This movement seeks to promote cooperation and unity among different Christian denominations rather than focusing on the divisions that exist. Ecumenism emphasizes shared beliefs and values and encourages dialogue among various Christian traditions to foster a spirit of understanding and collaboration.

The underlying principle is that despite differences in doctrines, rituals, and practices, Christians can come together in their common faith in Jesus Christ. Ecumenical efforts often manifest in joint worship services, shared community outreach programs, and collaborative theology discussions.

In contrast, fundamentalism typically refers to a strict adherence to particular theological doctrines and often involves a resistance to modernity and inter-denominational cooperation. Internalism is not widely recognized as a movement within Christianity, and although evangelicalism emphasizes spreading the Gospel and personal faith, it does not specifically target the unity of all Christian denominations in the way that ecumenism does.