Advocates argue that only children have advantages like avoiding sibling jealousy and receiving more parental attention, which can increase their self-esteem and confidence. However, only children may feel lonely. Parents can help prevent loneliness by encouraging their only child to be social and welcoming challenges. Ultimately, there is no simple answer to whether families should have one or two children - each family's circumstances are unique and what is best will depend on what the parents feel confident about.