What is a key characteristic of metaphysical theories as represented by Parmenides' views?

The concept of a singular reality is a key characteristic of metaphysical theories, particularly in the context of Parmenides' views. Parmenides argued that reality is unchanging and singular, emphasizing that change and multiplicity are illusory. This philosophical stance suggests that there is one true essence of reality that transcends sensory experiences and empirical observations.

In metaphysics, theories often seek to understand the fundamental nature of existence itself, rather than relying on the physical world and what can be observed. Parmenides sharply contrasts with views that prioritize change and sensory information, which is why his emphasis on a singular, unchanging reality is significant within the framework of metaphysical discussions. This focus on the underlying unity of being exemplifies the core of metaphysical inquiry, positioning Parmenides as a pivotal figure in the history of philosophical thought.