A new circular e+e- collider hosted in a 100 km tunnel, FCC-ee, produces high luminosity for top-quark, Higgs boson, W and Z boson studies, accommodates multiple detectors and can reach energies up to the top-pair threshold and beyond. It will enable measurements of unequaled precision, offering the exploration of physics beyond the Standard Model in the multi-TeV range. Moreover, being the natural precursor of FCC-hh, a 100 TeV hadron collider in the same tunnel, it builds up a long-term vision for particle physics. With this talk, I will make the case for FCC-ee by discussing the physics landscape and show opportunities to contribute to the project