This blog by Liberated Parenting (a group dedicated to moving from power and control to love and connection in parenting) published a article on nighttime family dynamics:
The beauty of it all is that you can do what is right for your family. It doesn't have to, a shouldn't be, the same for every family, particularly for every period of the family's life.
Crying it out, braving the monsters under the bed–these are not requirements for children raised in many other cultures.
The beautiful bond between the family is the fruit of co-sleeping. And if the fruit is good, the tree must be good.