The problem of being kind to others may have been solved by a school in Auckland.
Somerville Intermediate in Howick has created an Undercover Kindness Agency for its students.
Deputy Principal Chris Hall came up with the idea that sees random outbreaks of generosity in the playground.
"I thought it was a good idea in my head. I wasn't sure it would resonate with any of the students, I canvassed them and on the first day and had 90 students sign up," Mr Hall says.
Since then even more students have signed up to join the secret club.
Psychologist Jacqui Maguire says being kind is also helpful to the giver.
"There's decades of scientific research which shows that being kind to others has benefits to the giver. that includes lower blood pressure, increased energy and increased life span," Ms Maguire says.
The kids in the Undercover Kindness Agency are hopeful their kind ways will catch on.