Phylogenomics and the rise of the angiosperms

Angiosperms are the cornerstone of most terrestrial ecosystems and human livelihoods1,2. A robust understanding of angiosperm evolution is required to explain their rise to ecological dominance. So far, the angiosperm tree of life has been determined primarily by means of analyses of the plastid genome3,4. Many studies have drawn on this foundational work, such as classification and first insights into angiosperm diversification since their Mesozoic origins5,6,7. However, the limited and biased sampling of both taxa and genomes undermines confidence in the tree and its implications. Here, we build the tree of life for almost 8,000 (about 60%) angiosperm genera using a standardized set of 353 nuclear genes8. This 15-fold increase in genus-level sampling relative to comparable nuclear studies9 provides a critical test of earlier results and brings notable change to key groups, especially in rosids, while substantiating many previously predicted relationships. Scaling this tree to time using 200 fossils, we discovered that early angiosperm evolution was characterized by high gene tree conflict and explosive diversification, giving rise to more than 80% of extant angiosperm orders. Steady diversification ensued through the remaining Mesozoic Era until rates resurged in the Cenozoic Era, concurrent with decreasing global temperatures and tightly linked with gene tree conflict. Taken together, our extensive sampling combined with advanced phylogenomic methods shows the deep history and full complexity in the evolution of a megadiverse clade

The Burgundy Circle’s plans to undermine Louis XIV’s ‘absolute’ state through polysynody and the high nobility

Louis the duc de Bourgogne (1686 – 1712), grandson of Louis XIV, was briefly Dauphin of France before his premature death from measles. Advised by a group of noted former tutors and members of the court, Bourgogne’s Circle devised a range of plans to reform the French state under his future rule. Opposing the centralising model of sovereignty pursued by Louis XIV, the Circle intended to expand government, decentralise power into the provinces, reform an ailing economy, and resurrect the fortunes of a high-aristocracy believed to have been excluded from meaningful government. The Circle’s conviction that Louis XIV had circumvented the ancient nobility by tyrannical (‘absolutist’) means challenges revisionist interpretations of absolutism in ancien régime France. This article will therefore test revisionist claims that ‘absolutism’ did not exist in France, by assessing the contemporary opinion of the Circle’s key members. In so doing, it will reveal the divergent reform agendas of its members and contest previous historiographical notions that depict the group as possessing a cohesive ideology

Legitimacy

Legitimacy has emerged as a pivotal but often confusing construct in management research. The popularity of the concept and its widespread application to so many theoretical and empirical contexts has layered the construct of legitimacy with considerable surplus meaning. The object of this paper is to bring clarity and theoretical discipline to an important but misunderstood construct. We demonstrate through a description of the historical evolution of the construct that legitimacy has evolved in three distinct ways; from a focus on the property elements of legitimacy, to a focus on the process of legitimacy construction and finally to a focus on the cognitive practices by which legitimacy is negotiated