How does guru Nanak disregard the caste system?

Guru Nanak, the founder of Sikhism, fundamentally challenged the Caste System by emphasizing the equality of all individuals, regardless of their social status. He taught that one's spiritual worth is determined by their actions and devotion to God, not by their caste or lineage. Through his teachings and interactions, he advocated for a community where everyone, including lower castes, could participate equally in worship and social life. This egalitarian approach laid the foundation for Sikh principles of equality and brotherhood.