Alan Watts was a British philosopher, writer, and speaker known for popularizing Eastern philosophy and spirituality in the Western world. He was particularly influential in introducing Zen Buddhism, Taoism, and Vedanta to a wider audience through his lectures, books, and radio broadcasts.

Regarding the question of "Who is it that knows no ego?" Alan Watts often discussed the nature of the ego and its dissolution in his teachings. According to Watts, the ego or the "self" is a construct that arises from our identification with our thoughts, emotions, and body. He emphasized that this sense of individual identity is not a fixed, separate entity, but rather an ever-changing and interconnected process.

Watts suggested that the ego is a product of our conditioning and socialization, and that our true nature is not limited to this egoic self. He spoke about the possibility of transcending the ego and realizing a deeper sense of self or identity that is not confined to the narrow boundaries of individuality. This realization often involves recognizing the interconnectedness and interdependence of all things.

Watts often encouraged individuals to explore their direct experience and to question the assumptions and beliefs that give rise to the ego. He suggested that through practices such as meditation, contemplation, and self-inquiry, one could come to a direct experience of the "no-self" or the dissolution of the ego, leading to a greater sense of freedom and unity with the world.

It's important to note that the concept of "no ego" or "no-self" can be complex and nuanced, and interpretations may vary among different philosophical and spiritual traditions.