Chimpanzees have some level of intelligence insufficient for technological civilization. Our common ancestor with chimpanzees presumably had some level of intelligence insufficient for technological civilization. As our ancestors evolved gradually from that common ancestor, their intelligence increased gradually. As soon as it reached the level sufficient for technological civilization, they formed one, which has existed for the blink of an eye in evolutionary time. Current humans are just above that threshold, because we can only have been above it for a short time.
Chimpanzees have some level of intelligence insufficient for technological civilization. Our common ancestor with chimpanzees presumably had some level of intelligence insufficient for technological civilization. As our ancestors evolved gradually from that common ancestor, their intelligence increased gradually. As soon as it reached the level sufficient for technological civilization, they formed one, which has existed for the blink of an eye in evolutionary time. Current humans are just above that threshold, because we can only have been above it for a short time.