The article discusses the concept of self-assembly, a process where components, from molecules to macroscopic objects, spontaneously form ordered aggregates without external intervention. Self-assembly is crucial in various fields, including chemistry, materials science, and biology, and has applications in creating regular structures, such as molecular crystals, liquid crystals, and phase-separated polymers. The authors highlight that while molecular self-assembly is well-studied, self-assembly at larger scales (nanometers to micrometers) offers unique opportunities and challenges. They emphasize the importance of understanding and controlling the interactions between components, the environment, and mass transport for effective self-assembly. The article also explores the design of new self-assembling systems, particularly those based on capillary interactions, and the potential of self-assembly in fabricating complex structures for microelectronics, photonics, and nanoscience. The authors conclude by discussing the broader implications of self-assembly in science and engineering, emphasizing its potential to revolutionize molecular synthesis and material fabrication.The article discusses the concept of self-assembly, a process where components, from molecules to macroscopic objects, spontaneously form ordered aggregates without external intervention. Self-assembly is crucial in various fields, including chemistry, materials science, and biology, and has applications in creating regular structures, such as molecular crystals, liquid crystals, and phase-separated polymers. The authors highlight that while molecular self-assembly is well-studied, self-assembly at larger scales (nanometers to micrometers) offers unique opportunities and challenges. They emphasize the importance of understanding and controlling the interactions between components, the environment, and mass transport for effective self-assembly. The article also explores the design of new self-assembling systems, particularly those based on capillary interactions, and the potential of self-assembly in fabricating complex structures for microelectronics, photonics, and nanoscience. The authors conclude by discussing the broader implications of self-assembly in science and engineering, emphasizing its potential to revolutionize molecular synthesis and material fabrication.