After the fall of the Berlin wall and the disintegration of the former USSR and Yugoslavia, it has widely been assumed that socialist federations have become a thing of the past. Ethiopia’s ethnic federal system however is essentially a socialist federal system based on the notion of the ’right to self-determination of nationalities’ and a Marxist-Leninist organization of the state and party.

The later Middle Ages was an overwhelmingly rural world, with probably three out of four households reliant upon farming for a living. Yet conventional accounts of the period rarely do justice to the variety of ways in which the land was managed and worked.

Since its inception, just after the Second World War, Human Factors research has paid special attention to the issues surrounding human control of systems. Command and control environments continue to represent a challenging domain for human factors research.