 He was crucial in the negotiation of the 1961 constitution, which increased black representation in the Southern Rhodesian parliament.There was a relaxation of racial discrimination laws and a drive to enroll black voters during his period of office, but this was done against a background of civil unrest and a tightening of security measures.The policies of Whitehead's government caused alarm among the white population, while the blacks remained dissatisfied with the advances they had made.