Criticism of libertarianism includes ethical, economic, environmental and pragmatic concerns and is often focused on right-libertarianism. Critics have argued that laissez-faire capitalism does not necessarily produce the best or most efficient outcome, and that libertarianism's philosophy of individualism and policies of deregulation fail to prevent the abuse of natural resources. Criticism of left-libertarianism is instead mainly related to anarchism and includes allegations of utopianism, tacit authoritarianism and vandalism towards feats of civilization. Left and right-libertarians also engage in criticism of each other.