The 21st Biennale of Sydney examines the world today by borrowing the word ‘superposition’, the quantum mechanical term that refers to an overlapping situation. Microscopic substances like electrons are said to be dualistic in nature: they paradoxically exist in the form of waves and granular particles simultaneously. The state of superposition lies across all conceptual levels: from different climates and cultures to views of nature and the cosmic orders, conceptions of Mother Earth and interpretations of land ownership, readings of human history and conditions, the history of modern and contemporary art and the meaning of abstractions. The 21st Biennale of Sydney offers a panoramic view of how they all come together in a state of 'equilibrium', while delving into the workings of individual phenomena, considering the equivalence of these opposing notions through the lens of 'engagement'.