Here's what we know:
* Individual Variation: Just like humans, some monkeys show a preference for using one hand more than the other for certain tasks. This is called "handedness" or "lateralization."
* No Species-Wide Trend: There's no evidence to suggest that one hand is dominant across all monkey species. Some species might show a slight leaning towards one side, but overall, it's highly variable.
* Task-Specific Handedness: Even within individual monkeys, handedness might vary depending on the task. For example, a monkey might use its right hand for reaching but its left hand for grooming.
* Environmental Factors: Handedness in monkeys could be influenced by environmental factors like the availability of food or the presence of predators.
* Evolutionary Perspective: The development of handedness in primates, including monkeys, is likely a complex evolutionary process influenced by various factors.
In short, while some monkeys might show a preference for one hand, there's no clear answer to whether monkeys are right or left-handed. It's a complex and individual trait.