Chapter 12 endnote 8, from Lisa Feldman Barrett.
Some context is:
Macaques, however, don’t care about as many things as you and I do. Their affective niche is much smaller than ours; the sight of a majestic mountain rising in the distance doesn’t impact their body budget in the least. Simply put, more things matter to us. [...] Globalization is just a massive expansion of your affective niche.
The twentieth century brought about a massive expansion of the human affective niche, as television, newspapers, and the internet allowed us to access and participate in economic and social events around the world with ease. Globalization, by definition, is just a massive expansion of your affective niche. The excitement or dread that you experience when you view or listen to the news is evidence of this.
The question of why macaques have a smaller affective niche is still open, but the reason may relate to the fact that macaques don’t have an extensive interoceptive network as humans do. The macaques' network lacks the part that uses affect and interoception to direct attention to the outside world with great flexibility and range.