Lingayatism, also known as Veerashaivism, is a religious movement within Hinduism that emerged in the 12th century in the Indian state of Karnataka. It is a monotheistic sect that worships Shiva as the supreme deity and believes in the concept of individual devotion and spiritual enlightenment. One of the key principles of Lingayatism is social reform, which has led to its followers being known as Lingayats, meaning "those who wear the Linga (symbol of Shiva) on their body."

In terms of caste and background, Lingayatism is considered to be an egalitarian movement that rejects the traditional caste system of Hinduism. This is rooted in the teachings of its founder, Basava, who himself came from a lower caste and advocated for social equality and the abolition of caste-based discrimination. As a result, Lingayatism is open to people from all castes and backgrounds, and there is no discrimination based on one's social status or birth.

In fact, Lingayatism has a unique initiation process where anyone, regardless of their caste or gender, can become a Lingayat by wearing the Linga on their body and following the principles of the sect. This initiation process, known as "Lingodhbhava," symbolizes the equality of all individuals in the eyes of God and the rejection of any form of social hierarchy.

Furthermore, Lingayatism also promotes the concept of "Kalyana Rajya," which means a state of social harmony and equality. This includes the idea of "Anubhava Mantapa," which was a gathering place for people of all castes and backgrounds to come together and discuss spiritual and social issues without any discrimination. This further highlights the inclusive nature of Lingayatism and its openness to people from all walks of life.

However, it is worth noting that while Lingayatism may be open to all castes and backgrounds, it is still primarily practiced by the Lingayat community in Karnataka and some neighboring states. This is because the sect has a strong cultural and regional identity, and its followers are predominantly from the Lingayat community.

In conclusion, Lingayatism is a religious movement that is open to people from all castes and backgrounds. Its principles of social reform and equality reject the traditional caste system and promote inclusivity and harmony among all individuals. This welcoming attitude towards diversity is one of the key reasons for the popularity and growth of Lingayatism over the centuries.