Does this seem sexist? Or is it just my imagination?

I was flipping through Howard Zinn's "A People's History of the United States" and he mentioned a best-selling pocket book, published in London, that was widely read in the American colonies in the 1700s. It was called "Advice to a Daughter." Here's an excerpt...

You must first lay it down for a Foundation in general, That there is inequality in Sexes, and that for the better Oeconomy of the World; the Men, who were to be the Law-givers, had the larger share of Reason bestow'd upon them; by which means your Sex is the better prepar'd for the Compliance that is necessary for the performance of those Duties which seem'd to be most properly assign'd to it... Your Sex wanteth our Reason for you Conduct, and our Strength for your Protection: Ours wanteth your Gentleness to soften, and to entertain us...

Now, if that same article were written today, would it be considered sexist?

Or am I reading too much into this?