You need to load jQuery before backbone,
<script src="js/dependencies/underscore.js"></script>
<script src="js/dependencies/jquery-1.10.1.js"></script>
<script src="js/dependencies/backbone.js"></script>
You also cannot define empty event key value pairs,
events: {
// "": "initialization", <- this is invalid.
"click #aboutUs" : "aboutUs",
},