The article presents a comprehensive phylogenomic study of angiosperms, aiming to understand their evolutionary history and ecological dominance. The authors constructed a tree of life for nearly 8,000 angiosperm genera using 353 nuclear genes, a 15-fold increase in genus-level sampling compared to previous studies. This approach, combined with fossil calibration, revealed that early angiosperm evolution was characterized by high gene tree conflict and explosive diversification, leading to more than 80% of extant angiosperm orders. The study also found that diversification rates remained steady through the Mesozoic Era until they surged in the Cenozoic Era, coinciding with decreasing global temperatures and gene tree conflict. The findings highlight the importance of botanical collections in reconstructing the tree of life and provide insights into the complex evolutionary dynamics of angiosperms. The study's standardized panel of nuclear genes and universal tools for sequencing have facilitated future collaborations and data integration, advancing our understanding of angiosperm evolution.The article presents a comprehensive phylogenomic study of angiosperms, aiming to understand their evolutionary history and ecological dominance. The authors constructed a tree of life for nearly 8,000 angiosperm genera using 353 nuclear genes, a 15-fold increase in genus-level sampling compared to previous studies. This approach, combined with fossil calibration, revealed that early angiosperm evolution was characterized by high gene tree conflict and explosive diversification, leading to more than 80% of extant angiosperm orders. The study also found that diversification rates remained steady through the Mesozoic Era until they surged in the Cenozoic Era, coinciding with decreasing global temperatures and gene tree conflict. The findings highlight the importance of botanical collections in reconstructing the tree of life and provide insights into the complex evolutionary dynamics of angiosperms. The study's standardized panel of nuclear genes and universal tools for sequencing have facilitated future collaborations and data integration, advancing our understanding of angiosperm evolution.