Building a synthetic cell is one of the grand scientific and intellectual challenges of the 21st century. While we have extensive knowledge about the molecular building blocks that form the basis of modern life, we currently do not understand how these building blocks collectively operate to define life. With BaSyC we propose to build a synthetic cell from the bottom-up, which arguably is the most fundamental approach towards elucidating the cell’s intricate working and basic life-defining principles. Truly understanding cellular life will bring huge intellectual, scientific, and technological rewards. At the same time, it will raise fascinating philosophical and ethical questions about how society may cope with new opportunities that result from these new fundamental insights.