WildUtah, I have no idea where you are getting your information, but I am Irish, I have lived in Ireland my whole life. I'm in Ireland, looking out at Ireland as I write this message.

Your assessment is extraordinarily inaccurate.

"insanely crowded"?

Then why is the majority clamouring for more homes to be built? Property prices are climbing, not because things are too crowded, but because there aren't enough houses.[1][2]. Surely if it were "insanely crowded" here there'd be more of a popular pushback saying "where are we going to put these new houses?". Let me tell you: it doesn't exist.

The Irish government is going to great lengths to encourage new house building to meet the demand.

Ireland is famous for for manufacturing land out of the sea? Really? Well you're going to have inform this Irishman what you are referring to. The only things I can think of is the creation of Bull Island -- which was an unintended side-effect of the building of the Bull Wall, a successful project to dredge Dublin Bay undertaken in the early 18th Century [3] -- and various land reclamation projects around Dublin Port over the past 300 years, which a quick google search will inform you were more to do with planning permission than overcrowding.

For a country which is "insanely crowded", someone forgot to tell the population that. Add to this the population density facts which other commenters have provided, which you disregard and I can tell you that your information sources are lying to you.

[1] http://www.irishtimes.com/news/environment/review-of-the-yea...

[2] http://www.irishexaminer.com/business/features/shortage-of-h...

[3] https://en.wikipedia.org/wiki/Bull_Wall