Indifference

[Britney]

The quality or state of being indifferent, or not
making a difference; want of sufficient importance to constitute a
difference; absence of weight; insignificance.

[Greta]

[apathy] demonstrated by an [absence] of emotional [reactions]

[Becky]

The [lack of concern] of ones actions in respect of the impact it may have on another, and [a casual] display of ignorance when you have been found to be utterly [liable]

[Julene]

Lack of interest, concern, or sympathy.