The smartest monkey is widely believed to be the Chimpanzee. This agile primate exhibits the sharpest problem-solving skills across species, suggesting impressive cognitive ability.
Humans and chimpanzees share a common ancestor, and they are believed to have parted genetic ways about eight million years ago. Chimpanzees are renowned for their ability to devise creative solutions to challenge and manipulate their surroundings and produce tools to help them work better. Chimpanzees have been observed in the wild using sticks to hunt for termites and extract honey, rocks to crack nuts, and large leaves to glove their hands for dipping water.
Moreover, the use of tools by these monkeys equips them with the ability to understand and manipulate symbols in the same manner as humans do, making them the smartest of the monkey family.