In today's world, it is not enough for a nation to pass legislation in hopes of safeguarding the animals within its borders. As markets become more global, animals are increasingly caught in the middle of worldwide struggles. International trade laws can overturn national legislation, for example, or international agreements can render legislation ineffective. Often national legislation cannot fully protect wildlife—even within that nation's boundaries. Animals such as whales, dolphins, and elephants know no borders; therefore, the laws protecting them must follow them wherever they roam. Only when there are strong and effective international agreements will animals receive the protection they need and deserve.