 However, Suárez also conceived many particular cases — a casuistry — in which conquest was legitimized.Hence, war was justified if the indigenous people refused free transit and commerce to the Europeans; if they forced converts to return to idolatry; if there come to be a sufficient number of Christians in the newly discovered land that they wish to receive from the Pope a Christian government; if the indigenous people lacked just laws, magistrates, agricultural techniques, etc.In any case, title taken according to this principle must be exercised with Christian charity, warned Suárez, and for the advantage of the Indians.