Most people do their best to avoid feeling lonely.
His most recent research, the Loneliness Project, involved speaking to 80 older people from different countries to get a better understanding of what loneliness means for them.
"I think it's only recently that I've realized that loneliness is a big part of all human suffering.
It's sort of like the common denominator," says Carr, who recently published a book called "All the Lonely People".
"I actually see it as an inevitable part of life," he says, adding that "to be alive is to be lonely."
Persons:
Sam Carr, I've, Carr
Organizations:
University of Bath, CNBC