Carl Rogers (1902-1987) was a humanistic psychologist agreed with most of what Maslow believed, but added that for a person to "grow", they need an environment that provides them with genuinness (openness and self-disclosure), acceptance (being seen with unconditional positive regard), and empathy (being listened to and understood).
Without these, relationships and healthy personalities will not develop as they should, much like a tree will not grow without sunlight and water.
Rogers believed that