The concept of universal love, also known as "jian'ai" in Mohism, is a central principle in the philosophy of Mohism. It is the belief that all individuals should be treated with equal love and compassion, regardless of their social status, wealth, or background. This concept is closely tied to the idea of meritocracy, which is the belief that individuals should be judged and rewarded based on their moral character and contributions to society, rather than their social status or wealth.

In Mohism, universal love is seen as the foundation of a harmonious society. The philosopher Mozi believed that if individuals treated each other with love and compassion, it would lead to a peaceful and stable society. This love is not limited to one's family, friends, or community, but extends to all human beings. Mohists believe that all individuals are equally deserving of love and should be treated with kindness and respect.

One of the key principles of universal love in Mohism is the idea of "yi," which means righteousness or moral duty. Mohists believe that it is the moral duty of individuals to treat others with love and compassion, regardless of their relationships or personal feelings towards them. This means that even if someone is not related to us or does not share our beliefs, we should still treat them with love and kindness.

Another important aspect of universal love in Mohism is the idea of "gong," which means to show concern and care for others. This involves actively seeking out opportunities to help and serve others, without expecting anything in return. Mohists believe that by showing concern for others, we can cultivate a sense of empathy and understanding towards them, leading to a more harmonious society.

Mohism also emphasizes the importance of selflessness in practicing universal love. This means putting the needs and well-being of others before our own. By doing so, we can create a sense of unity and cooperation within society, rather than focusing on individual gain.

In conclusion, the concept of universal love in Mohism is based on the belief that all individuals are equal and deserving of love and compassion. It is the foundation of a harmonious society, and is closely tied to the idea of meritocracy. By treating others with love and kindness, and actively seeking to help and serve them, Mohists believe that we can create a more peaceful and just world.