Pro-slavery groups campaigned against abolition in several ways: 1) They argued that ending slavery would be economically harmful as it would cost Britain tax money and jobs in industries like sugar that relied on slave labor. 2) They claimed Britain needed the money from slavery to fund wars against France and that naval expertise from slave ships and shipbuilding strengthened Britain's military. 3) Anti-abolitionists asserted that slavery was justified by arguing Africans were inferior and that slaves were better off as Christians in bondage. 4) Groups supporting the continuation of slavery sent petitions to Parliament, published pamphlets promoting the same arguments, and sometimes bribed MPs to oppose ending the slave trade.