This document discusses the need for open science and data sharing to advance genomics research and drug development. It outlines the vision and mission of Sage Bionetworks to create a "Commons" where integrative models of disease are built and evolved through data sharing and collaborative research. Some key barriers to open science are addressed, such as standards, tools, recognition of contributors, and changing incentives around data hoarding. The opportunity of networks to identify disease drivers and therapies from large genomic datasets is highlighted.