Insouciance in a sentence as a noun

"...the style of the company’s products — playful, a little rebellious, definitely strange — does indeed evoke the slouchy insouciance of teenagers.

When people start dying at the age of twenty and thirty of bacterial infections that are totally curable today, and gonorrhoea becomes incurable, will we think our current insouciance rational?

Insouciance definitions

noun

the cheerful feeling you have when nothing is troubling you

See also: carefreeness lightheartedness lightsomeness