I've mentioned before that genealogy is my hobby.
I have a 3 time great grandfather who remarried in his forties to a 19 year old and she had two daughters. The two parents must have died because they disappear from records. One of these daughters is living as a boarder (probably fostered) in an older woman's home and she marries a neighbor at about age 20. However, the other daughter is only on marriage records and so far one census record. So far I have her up to six marriages. She made herself older to get married the first time and I think she has one son but it looks like this husband divorced her. In addition, the son is divorced on the last census record. She keeps getting married over and over. Naturally, she gets younger in the later marriages. Each of the guys she marries has multiple marriages and each of those wives has multiple marriages. Most of these marriages didn't last but six months to a year. I am still researching her because the trail runs dry in 1930. She might have out of state marriages that I haven't found yet.
I don't know why we are told that divorce is a new thing because look at this research.
I am descended from a daughter from the previous marriage and she had 4 kids but only 2 had kids. And she died before age 50.
I am going to keep researching at the library because if some of these people moved out of state then Ancestry will have more info.