After an outline of the history of evolutionary algorithms, a new ( ) variant of the evolution strategies is introduced formally. Though not comprising all degrees of freedom, it is richer in the number of features than the meanwhile old ( ) and ( + ) versions. Finally, all important theoretically proven facts about evolution strategies are brie y summarized and some of many open questions concerning evolutionary algorithms in general are pointed out. 1 A Brief History of Evolutionary Computation Since the spring of 1993,when the rst issue of the international journal on Evolutionary Computation 1] appeared, more and more people have become aware of computer algorithms known to insiders since nearly thirty years as Genetic Algorithms (GAs), Evolution Strategies (ESs), and Evolutionary Programming (EP). As a common denominator the term Evolutionary Algorithms (EAs) has become rather widespread meanwhile. Likewise common to all three approaches to computational problem solving, mostly in...