Mahāyāna is the largest branch of Buddhism, followed by Theravada. It is a broad group of Buddhist traditions, texts, philosophies, and practices that developed in various regions and Buddhist communities of ancient India. Mahāyāna Buddhism accepts the main scriptures and teachings of early Buddhism but also recognizes various scriptures that are not accepted by Theravāda Buddhism as canonical. Mahāyāna scriptures like the Lotus Sutra and the Vajra-cutter Sutra emphasize the ideal of the bodhisattva, spiritual heroes who vow to attain buddhahood for the sake of saving all living beings. These scriptures also contain unique teachings such as the Perfection of Wisdom and Buddha-nature.