How did Aeschylus influence later Western theatre and drama?

Aeschylus, the first of classical Athens' great dramatists, fundamentally transformed tragedy into a sophisticated art form, establishing a model for Western drama that remains influential today.123

His primary contributions include:

• Structural Innovation: By introducing a second actor (the deuteragonist), Aeschylus moved drama beyond static recitations between a single actor and a chorus. This allowed for genuine dialogue, increased dramatic tension, and greater freedom in plot construction.1
• Thematic Depth: Aeschylus shifted the focus of myths from absolute, unquestioned events to critical explorations of human existence. He introduced a questioning spirit, examining complex moral issues such as divine justice, hereditary guilt, and the conflict between individual freedom and societal duty.13
• Psychological Insight: He provided a vivid sense of the internal reality of his characters, portraying the experience of conflicting loyalties and suffering with a depth that paved the way for later dramatists.3
• Artistic Legacy: His use of dramatic orchestration, recurring motifs, and the integration of personal, social, and religious themes set a standard for tragedy. His work continues to resonate with modern playwrights like T.S. Eliot and Jean-Paul Sartre, who have adapted his archetypal themes for contemporary audiences.13