Simplify the following text for a Grade 9 native English-speaking person.
Original: According to inclusive fitness theory , eusociality may be easier for species like ants to evolve , due to their haplodiploidy , which facilitates the operation of kin selection .
Simplified: If the theory of inclusive fitness is applied , ants will evolve eusociality more easily . Haplodiploidy makes kin selection easier .