Description: In this volume, current research on the origin and evolution of active galaxies is comprehensively surveyed. Both of the proposed types of central activity--active galactic nuclei and starbursts--are analyzed with a particular emphasis on their relationship to the large-scale properties of the host galaxy. A crucial question investigated is what triggers and fuels nuclear activity now and at earlier epochs. Other topics covered include gas flows near to massive black holes, the circumnuclear galactic regions, and the large-scale bars in disk galaxies. Aspects of nuclear bursts of star formation, and the relationship between central activity and the gas and stellar dynamics of the host galaxy are addressed as well.

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