Plato is considered the father of idealism because he argued that the ultimate reality is the world of Forms, which is a realm of perfect and unchanging ideas.

Idealism asserts that the world is fundamentally mental, meaning that it is composed of ideas, thoughts, and consciousness.

Idealism influenced the development of modern philosophy by leading to the rise of rationalism, which is the belief that reason is the primary source of knowledge.

Hegel argued that the world is a manifestation of the Absolute, which is a single, unified, and infinite reality.

Idealism influenced the development of science by leading to the rise of theoretical science, which is the study of the fundamental laws of nature.

Berkeley argued that the world is a product of the human mind, and that nothing exists outside of the mind.

Idealism influenced the development of religion by leading to the rise of pantheism, which is the belief that God is identical with the universe.

Descartes argued that the world is a dream, and that we can never be certain of anything except our own existence.

Idealism influenced the development of ethics by leading to the rise of virtue ethics, which is the belief that the good life is a life lived in accordance with virtue.

Leibniz argued that the world is a manifestation of the divine mind, and that it is the best of all possible worlds.

Idealism influenced the development of art by leading to the rise of symbolism, which is the use of symbols to represent ideas or emotions.

Fichte argued that the world is a product of the human imagination, and that it is created by the activity of the self.

Idealism influenced the development of literature by leading to the rise of romanticism, which is a literary movement that emphasizes the importance of imagination, emotion, and individuality.

Schopenhauer argued that the world is a product of the human will, and that it is a manifestation of the cosmic will.

Idealism influenced the development of music by leading to the rise of romantic music, which is a musical style that emphasizes the importance of emotion and imagination.