This document summarizes a guest lecture on how GIS 2.0 impacts humanitarian affairs and genocide studies. GIS 2.0 is defined as incorporating web 2.0 principles of openness, collective intelligence and network effects into geographic information systems. This allows for ubiquitous communication through wireless networks and cloud computing. Examples are given of how crowdsourcing through OpenStreetMap helped relief efforts in Haiti, and how virtual globes like Google Earth can integrate qualitative and quantitative data to study issues like genocide. The conclusion is that GIS 2.0 provides a framework to better understand humanitarian crises by combining different data sources.