Purity
Minimalism signifies that design prioritizes function and production. More broadly though, it is an acknowledgment that designed objects don’t exist in isolation, and therefore have a deep need to seamlessly interact and integrate with other objects, and ultimately with the user.
Perhaps though, at its core, minimalism is an admission that humans are deeply irrational, and emotional, and seek to overcome these imperfections externally, through simplicity, order, and cleanliness.
This longing for purity penetrates all of our habits, rituals, and objects. It is a culture-wide obsession, and perhaps why minimalism endures.