It's important that we attempt to extend life beyond Earth now. It is the first time in the four billion-year history of Earth that it's been possible, and that window could be open for a long time - hopefully it is - or it could be open for a short time. We should err on the side of caution and do something now.
"Uberpreneurs: How to Create Innovative Global Businesses and Transform Human Societies". Book by Peter Andrews and Fiona Wood, December 8, 2013.