overview effect: A cognitive shift in awareness reported by astronauts upon seeing Earth from space, leading to a feeling of global interconnectedness and concern for the planet. nationalism: An ideology that places the interests of one's own nation above those of other nations, often leading to a reluctance to engage in international cooperation. Spacebuzz: A Dutch educational initiative that uses virtual reality to provide children with an immersive experience simulating the 'overview effect' to inspire a sense of global stewardship.