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In the Northern Hemisphere, from the Devonian till the Triassic period, in addition to the Euramerican landmass, another isolated continent called Angara existed. This area was distinguished by a fasten radiation of plants that have many similarities with today’s angiosperms. Here, one encounters many different insect families that can be regarded as ancestors of extant mayflies, Orthoptera, Blattodea, also the Neuroptera, beetles, cicada, scorpionflies, caddisflies or perfectly conserved spiders. Probably, even the butterflies and the Hymenoptera (sawflies, wasps, bees and ants), as well as the true flies (Diptera) evolved during that time. This publication gives a brief insight into the mutual symbiosis plants and insects lived in, what advantages it brought for both and why the Carboniferous-Permian evolution of insects and angiosperms cannot be regarded as a “wonder” but a normal stage of development. It will explain how a disastrous coincidence occurring on the Permian-Triassic border stopped a sudden worldwide propagation.