The music of Israel is a combination of Jewish and non-Jewish music traditions that have come together over the course of a century to create a distinctive musical culture. For almost 150 years, musicians have sought original stylistic elements that would define the emerging national spirit. In addition to creating an Israeli style and sound, Israel's musicians have made significant contributions to classical, jazz, pop rock and other international music genres. Since the 1970s, there has been a flowering of musical diversity, with Israeli rock, folk and jazz musicians creating and performing extensively, both locally and abroad. Many of the world's top classical musicians are Israelis or Israeli expatriates. The works of Israeli classical composers have been performed by leading orchestras worldwide.