The majority of primates are social. That includes lemurs, monkeys, apes, and humans. Some exceptions include orangutans, tarsiers, and lorisis.
Most species of monkeys live in groups. The size of a group depends on how much food is available and if there are predators around.
The tailless primates that are most like humans are bonobos and chimpanzees. They share a close genetic relationship with humans and exhibit complex social behaviors, tool use, and problem-solving abilities similar to humans.
A well-developed cerebrum is the structure in primates that enables them to develop complex social systems. Cerebrum is Latin for brain.
Nothing really. Primates groom as a social activity most times. Grooming to them is like humans going and hanging out with friends somewhere. Obviously they use it to get clean and look for things in their fur (monkeys) or hair (apes).
yes because they live in families or groups.
Other primates don't kill other things because they think it's "fun".
Macaques
in a village
most primates CAN walk on two feet, but choose not to.
Prosimians
Counting out the human being....most likely Primates
A well-developed cerebrum