Well am I to believe that all the evolutionary chains all started at the same time so they are in a phase that isn't visible today? - Hadriel
There is only 1 chain and all life has evolved from that 1 starting point (there is some evidence that suggests we might have found something that is not related to everything else - a bacteria like organism - but that is not settled yet as far as I know), there are not many that just happen to have converged on life at the same time. That is not to say life didn't start many number of times and become extinct before really getting going but we may never know that. The genetic evidence is as conclusive as it needs to get on that issue; not to say there isn't more to learn but once you know the Earth isn't flat all other following geological understandings do not change that fact.