Sixty years later, this enormous effort has been made and the mission has basically been accomplished. As a collective, theoretical chemists and physicists have developed methods, that simulate the electronic structure of molecules up to hundreds of atoms, both in vacuum and in solvents, and that can calculate practically all observables of interest to experimentalists. Furthermore, although the so-called "chemical accuracy" cannot be obtained for all the calculations, quantum chemistry calculations have become a useful everyday tool in the arsenal of chemists.