What contribution was made by Sree Narayana Guru for the welfare of the lower caste people?

Sree Narayana Guru was the leader of a reform movement that opposed casteism and supported social justice and spiritual freedom.
He advocated for united humanity that transcends caste and religious barriers.
Additionally, he supported the Vaikkom Satyagraha, which attempted to provide lower castes in Travancore access to temples.
Shree Narayana Guru was a member of the Keralan Ezhava caste at birth.
He was only 15 years old when his mother passed away.
Sri Narayana Guru attended a gurukul and is the residence of a devoted instructor who oversees an Ashram to further his education.
He pursued literary and Sanskrit studies.
Shri Narayana Guru immersed himself in spirituality and used what he learned to combat superstitions and advance equality, cleanliness, and business.
Sree Narayana Guru was the leader of a reform movement that opposed casteism and supported social justice and spiritual freedom.

Summary:

Some of Sree Narayana Guru's contributions to the welfare of people from lower castes include the following:

Sree Narayana Guru was the founder of a reform movement that favored social justice and spiritual freedom while opposing casteism.
He promoted the idea of a single human race free from caste and religious divisions.
He also pledged his support to the Vaikkom Satyagraha, an initiative that sought to open Travancore's temples to lower castes.