1. The first world people had to deal with threats of uncertain war and the weapons used in those war were so much devastating that it’s affect could be sensed even till now. Example the nuclear weapon used upon Heroshima and Nagasaki paralysed the people of Japan. Whereas the present third world people have lesser threat of war and with the norms like arms control prevent usage of nuclear weapon.

2. The first world people faced epidemics that killed lakhs of people whereas this kind of epidemics are preventable in the third world with so many preventable cure available in medical science

3. The major threat the people of third world faces is the environmental threat, the rise in global warming has increased the sea level that some islands faces the threat of being washed off. Whereas the first world people did not face such threat.