They were. Humans are mammals. All mammals suckle their young at the breast.
During the 20th century, in many cultures, we moved away from breastfeeding not realizing the role it plays for mother and child. Over the last few decades, we have learned though how important it is both psychologically and biologically for mama and baby. Breastfeeding provides so much more than just food. It provides love and nurturing, immune support, and health protections to both members of the breastfeeding pair.
If you are unsure about breastfeeding, just give it a try. You can always stop. But if you don’t start right away, it can be difficult if not impossible later on to give your baby what nature intended.
Babies were born to be breastfed.