Final answer:
Having low self-esteem makes it harder to resist peer pressure.
Step-by-step explanation:
The personal or social condition that makes it harder to resist peer pressure is having low self-esteem. Individuals with low self-esteem may seek validation and acceptance from their peers, leading them to conform to peer pressure even if it goes against their own beliefs or values. They may rely on the approval of others to feel good about themselves, making it difficult for them to resist the influence of their peers.