Charles Lada Binary Quotations

There are theories that can form binary stars and theories that can form single stars, but there none that explain why you form more singles than binaries.

It depends on how you count. If you have 80 billion of what we call primaries, and you have 25 percent in multiple stars, then about 20 billion red dwarfs are in these binary systems, but another 60 billion are single. It's not often appreciated how numerous they are, but they are the most numerous of all stars.