Are dynamism and stability contradictory? Yes, if dynamic means changing and stable meanings unchanging. However, nothing is unchanging. A socioeconomic system can be static (change-resisting), like feudalism, or dynamic (self-transforming), like capitalism. We need to combine maintenance of a material and cultural environment (stability) with free human development (dynamism). Economic crises destabilize society but must competitive economies have crises? Or must dynamic economies be competitive? My answers to these two questions are, respectively, yes and no - but there are different answers.
Poul Anderson addresses these fundamental questions here and in several other works.