You couldn't ask for two more mentally stable people than Kim Jong Un and his orange alter-ego, "Dementia Donald" Trump.
The world faces a "nuclear crisis" from a "bruised ego", the International Campaign to Abolish Nuclear Weapons (Ican) has warned in an apparent reference to US-North Korea tensions.
Accepting the Nobel Peace Prize on Sunday, Ican's executive director Beatrice Fihn said "the deaths of millions may be one tiny tantrum away".
"We have a choice, the end of nuclear weapons or the end of us," she added.
Tensions over North Korea's weapons programme have risen in recent months.
The open hostility between US President Donald Trump and the North Korean leadership under Kim Jong-un has at times descended into personal attacks this year.
Prior to presenting the prize on Sunday, Nobel committee chair Berit Reiss-Andersen offered a similar warning, saying that "irresponsible leaders can come to power in any nuclear state".