“Battle is an apt metaphor for what we scientists do. There is a fierce competition that begins the day you declare yourself a physics major. First, among your fellow undergraduates, you spar for top ranking in your class. This leads to the next battle: becoming a graduate student at a top school. Then, you toil for six to eight years to earn a postdoc job at another top school. And finally, you hope, comes a coveted faculty job, which can become permanent if you are privileged enough to get tenure. Along the way, the number of peers in your group diminishes by a factor of ten at each stage, from hundreds of undergraduates to just one faculty job becoming available every few years in your field.”