Rape is reported on surveys to be one
of women's very worst fears. The fear is often a very disturbing
facet of most women's experience of life. I believe that for many,
the prospect has a kind of horror to it that would not be present
from being beaten, even if it resulted in broken bones.
Evolutionary theory includes a
distinction between how an organism works and why the organism works
that way. For one example, in <this earlierpost> I explained how a desire for sex is explained in evolutionary terms
because it resulted in producing offspring, and that evolution has
not endowed us with a similarly strong desire to actually produce
offspring. This allows widespread use of contraceptives without any
sort of turmoil.
Consider non-evolutionary explanations
for why rape is so upsetting. It rarely leads to serious physical
trauma. Plan B can prevent pregnancy, STI transmission is rare and
most STIs are treatable. What makes it uniquely upsetting? Sometimes
the problem is explained as physical penetration of the body. Yet if
some man put his fingers in a woman's mouth, the penetration aspect
is there but the insult would be less. Ingesting food is also a
penetration of the body, but we think about it entirely differently.
Sometimes it is explained as a reaction to the male's desire to
dominate and humiliate. Yet of course such desires could be expressed
in many other ways. If women and men perceive it as uniquely
humiliating, we are left wondering WHY it is perceived that way.
A man is in uncomfortable territory
talking about women's experience as I did above (though it's worth
considering that each woman actually knows nothing for sure beyond
her own individual experience). In what follows I'm discussing what
lies behind conscious experience and is thus not accessible to anyone
based on reflection. Men and women are on an equal footing here.
Evolutionary psychology asks whether
evolution has "wired" women to hate rape, and it has a good
story to tell as to why the answer is "yes". A very naive
story might be that since descendants are good, sex is what produces
descendants, and rape is a form of sex, women might welcome it. But
this ignores how women left successful offspring in the environment
we evolved in. Ignoring many complications, humans tend to have
long-term pair bonds so that only one man has sex with a woman and he
assumes that any children the woman has are his children, and he
provides food for those children (mostly meat, in the environment we
evolved in). The number of children a woman can bear is primarily a
function of time -- every 2, 3, or 4 years, in natural conditions of
nursing and a somewhat restricted diet. She invests enormous
resources in each child through pregnancy and nursing. She also runs
a significant risk of dying in childbirth. She of course requires
sperm to conceive those children, but sperm is very easy for her to
get. In a typical hunter-gatherer band there were plenty of adult men
around, many or most of whom will be happy to inseminate her. In
contrast, a large determinant of whether her children will thrive is
whether a man will be providing food for them. All else being equal,
it is in her interest to only have sex with her assigned mate (call
him a "husband") and to do whatever she can to reassure him
that he is indeed the father of her children.
If she does not have a husband and gets
pregnant, this is terrible for her as there is no male to help her
raise the child. If she is married and is raped, there are other
dangers. If word gets back to her husband, he may abandon her in
search of a new woman where he would be more certain that future
children are his. Abandoning a wife after she is raped might seem
like a callous thing to do, but evolution has its own imperatives,
and providing for children who carry your genes as opposed to some
other man's is a big factor in male reproductive success.
So possible consequences of rape for a
woman include loss of material support for any child she might bear
as a result of that sexual encounter or for one that was conceived in
roughly the same time frame, and for her other children if she has
children already. This is a huge risk for her. Women also have a
strong incentive in the environment we evolved in to not to report
rape, to avoid these consequences.
Women of course desire sex under the
right circumstances, and need it to leave descendants. But they feel
extremely strongly about not wanting it under the wrong
circumstances. They are not just being picky or difficult. Evolution
has wired them to care a great deal about the circumstances.
In the modern world, morning-after
pills can ensure that rape victims do not become pregnant. They can
likely trust that if they are partnered, their partner will not
abandon them. Yet these conscious considerations cannot simply
overcome the tendencies wired into our genes.
I'm not sure if understanding this
could lead to more empathy from men, in turn leading to taking the
crime of rape more seriously, and to actually deterring rape itself.
But if it has any effect it should point in that direction.