Here are the first world nations where birthright citizenship is the law:
Canada
United States

Here are the first world nations where it isn’t:
Andorra, Australia, Austria,
Austria, Belgium, Bermuda,
Cyprus, Czech Republic, Denmark
Faroe Islands, Finland,
France, Germany, Greece,
Holy See, Hong Kong, Iceland,
Ireland, Israel, Italy,
Japan, Liechtenstein, Luxembourg,
Malta, Monaco, Netherlands,
New Zealand, Norway, Portugal,
San Marino, Singapore, Slovakia,
Slovenia, South Korea, Spain,
Sweden, Switzerland, Taiwan,
United Kingdom

Australia revoked birthright citizenship in 2007, New Zealand revoked it in 2005. This isn’t a novel idea, it’s just novel here because it’s been settled law for so long.