Final answer:
Ivan is most likely to have paranoid personality disorder, which is characterized by a pervasive distrust and suspicion of others.
Step-by-step explanation:
The person described in the question, Ivan, who believes that other people are up to something bad and has a general distrust of others, is most likely to have paranoid personality disorder. Paranoid personality disorder is characterized by a pervasive distrust and suspicion of others, without any evidence to support these beliefs.
Individuals with paranoid personality disorder often interpret neutral actions or statements as being intentionally harmful or threatening. They may be constantly on guard, have difficulty trusting others, and may also have difficulties forming close relationships. It's important to note that only a trained professional can diagnose a personality disorder. If Ivan or someone you know exhibits these behaviors, it is recommended to seek help from a mental health professional.