However, I very strongly doubt that any top player now plays, or has played in many years, that a 1♠ opening bid should be stronger than a 1♣ bid, or that a 1♠ response should be sound, both out of fear of preempting partner.
There are normally twice as many opponents as there are partners!
The modern game involves light opening bids and, by the standards of yesteryear, feather-weight responses.
Old books are interesting: I have some going back well before auction. But they are not always sound.
My personal favourite (and oldest) is The Bridge Manual, by John Doe, published in the early 1900's. In one chapter it recommends an opening lead against notrump of the A from AQxx. A chapter later, dealing with how third hand should play on defence, it recommends that with Kxx in a suit in which partner has led the A against notrump, one should immediately play the K to 'get out of the way' of partner. It seems that this book was not well edited
Bridge is a darwinian environment: if you come across some long-unplayed suggestion, the odds are very good that the suggestion should remain unplayed.

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