Globalization has made it more difficult for leaders of countries to assert that national cultural norms are more important than global standards of behavior. for example, penetrate/s national borders and erode/s traditional values.

Globalization has made it more difficult for leaders of countries to assert that national cultural norms are more important than global standards of behavior. For example, the United Nations, transnational corporations, the globalized entertainment industry penetrate/s national borders and erode/s traditional values.

there is an explationation of this on a site called crash   course world history 1