Entrepreneurship is a multifaceted phenomenon that cuts across many disciplinary boundaries. Each discipline has its unique way of viewing entrepreneurship and reaching its own points and results. We hold that entrepreneurship phenomenon is the nexus of entrepreneur, opportunities and resources. The two fundamental processes of entrepreneurship are discovery and exploitation of entrepreneurial opportunities and acquisition and combination of necessary resources. Entrepreneur is the agent to realize the two processes. Entrepreneur not only has his or her own characteristics as individual but also is embedded in social structures. We review past entrepreneurship research within the dimensions of individual, opportunity and resources. The purpose of this review is to delineate the skeleton of entrepreneurship research and reveal the main constructs in each research perspective.