I do agree that Economics is not yet an reliable scientific subject, i.e. you can not predict future in accurate by doing scientific computations, and I do not

I do agree that Economics is not yet an reliable scientific subject, i.e. you can not predict future in accurate by doing scientific computations, and I do not think it will. But why natural? The economy involves, most importantly, rational (or not) human being who behaviors accordingly. And these behaviors must connected with the others socially. So, how could we learn the economy without studying these social things?