Professor of the Joseph Fourier University (Honorary Professor of the Grenoble Alps University), Jean Bornarel was one of the first to understand ferro-elasticity existence at a time when only ferroelectricity was known. His activities in different fields persuaded him that it was necessary to propose bridges between them. In this book, bonds between ferroelectrics and ferro-elastics on the one hand and between nano, micro and macro levels on the other.