You could say “parenting instincts are in our DNA” and it’s true – our instincts towards small children evolved over hundreds of thousands of years of living communally in hunter-gatherer tribes. While the world has changed rapidly, our evolved instincts have not.

Anna Machin’s look at “Human Fatherhood” starts from two simple observations: we are among the only 5% of mammals that have “investing fathers;” and the physiological changes that happen to men when they become fathers would not have been favored by evolution unless father investment was vital to our survival.

It all begins with an idea.