Why were letters so important to Emily Dickinson’s early writing life?

For Emily Dickinson, letters were the primary medium of her early writing life, serving as a vital social and creative outlet until she reached her mid-20s. These communications were essential for several reasons:1

• Social Connection: Writing began with a strong social impetus, allowing Dickinson to engage in "intimate communion" with friends and family, such as her brother Austin and correspondents like Abiah Root, Jane Humphrey, and Susan Gilbert.1
• Creative Expression: Her letters were not merely functional; they overflowed with humor, invention, anecdote, and somber reflection, acting as a space for her to perform for an audience and explore her visionary fancies.1
• Coping with Solitude: Much of her early writing was premised on feelings of abandonment and a desire to overcome or reflect on solitude. When friends failed to reply or drifted away, she often interpreted this as neglect, making the act of writing a way to maintain bonds despite the "basic pattern" of losing friends to death or cooling interest.1
• Literary Development: Her epistolary relationships often had a literary flavor, helping her discover influential poets like Ralph Waldo Emerson and Elizabeth Barrett Browning, which stimulated her own poetic ambition.1