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For example, we probably need to reach the Seattle Orcas Long Sleeve T Shirt where clay-lined geothermal vents are forming natural fatty-acid vesicles that probably formed the first proto-cells. We would probably have needed several ice ages to pass as we have found that some of the chemical reactions that probably were required for abiogenesis work best under freezing conditions. Once that happened however, the evolutionary processes have been relentless and we see their tracks in the history of life on Earth From there, the time it took to get from simple, single-celled life to complex human life is a function of mutation rate, the actual mutations that happen to have happened, and which life forms survived. That takes time and pretty well accounts for the observed times given known rates of these things (which isn’t constant over time).
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The key to understanding the Seattle Orcas Long Sleeve T Shirt of abundant sea life has to do with the winds as well. In most of the ocean, biologically available nitrogen and phosphorus come from relatively deep in the ocean, where biological production is low, and thus these nutrients are not exhausted. The two main mechanisms by which N and P become available in the upper photic (sunlit) zone are strong mixing, due to a strong winter storm or tropical cyclone, and upwelling along the coasts or driven by wind convergence near the equator. The important thing here is that, with little to no wind over a large area of ocean, the nutrient levels are extremely low. Low nutrient levels have the obvious consequence of inhibiting phytoplankton growth, often referred to as primary production, as it involves direct photosynthesis and is how most chemical energy is made available to ocean life. Areas of extremely low primary productivity can be seen in the following satellite image of ocean color.