reduces violence, adding that the notion "violence only creates more violence" is a pacifist myth. As an example of "extensional self-defense", he cites the use of armed soldiers by some African governments to protect endangered wildlife from poachers, stating that "pacifists cannot stop poachers, but bullets can, and while many measures must be taken to protect endangered species, right now armed soldiers are the best protection rhinos and elephants have against murderous, weapon-wielding poachers." Best also warns against romanticizing violence, and asserts that a variety of tactics can be used depending on the situation. He refers to this as the contextualist position: In a global setting, contextualism asks this question: How can we best defend all life and the entire planet from the massive and unrelenting assault of global capitalism, centralized political rule, militarism, and the metastasizing growth of the human empire colonizing the earth and monopolizing its resources? Questions concerning the legitimacy and efficacy of physical force cannot be answered in the abstract, but only in specific contexts. Whereas partisans on both sides want to read the history of moral progress as driven exclusively by nonviolence or violence, the fact is that social change unfolds through the entire arsenal of pressure tactics, which include strikes, protests, demonstrations, boycotts, sabotage, liberation, education, legislation or even armed struggle. Best has explained a justification for civil disobedience in the essay Beyond Animal Liberation. Ban from entering the United Kingdom In 2005, Best planned to attend a rally to celebrate the closure—as a result of protests from the animal rights movement—of Newchurch Farm, where guinea pigs were being bred for research purposes. Charles Clarke, the British Home Secretary, said he would rely on new Home Office rules preventing people from enter the UK if they "foment, justify or glorify terrorist violence in further of particular beliefs; seek to provoke others to terrorist acts; foment other serious criminal activity or seek to provoke others to serious criminal acts." In a letter to Best dated August 24, 2005, Clarke cited a comment by Best quoted by The Daily Telegraph: "We are not terrorists, but we are a threat. We are a threat both economically and philosophically. Our power is not in the right to vote but the power to stop production. We will break the law and destroy property until we win." Best is also alleged to have said that the animal rights movement did