[UCANSEE2]

There are a LOT of ancient cities under the waves as the sea level was far lower during the last ice age.

I disagree with your concept that the seas have risen.

The land rises and falls, and very unevenly , I might add.

Water, being 'fluid', simply flows to the lowest spot (because of gravity), and maintains a very smooth/flat surface.

It is the land moving up or down that makes water appear to be rising or falling.

The 'tides' are one of the few examples of the ocean level actually rising or falling. Even in that example, the land also rises and falls with the tides.

[RJS1950]

Yes, land can rise and fall based on tectonics or compression/decompression by massive glaciation. The great lakes are an example where the crust was compressed by the massive mile high glacier that covered the area and since the retreat of the glacier the land has been rising (decompressing) albeit very slowly. Glaciers are still one of the primary reasons for lowered sea/water levels because the water increasingly becomes bound up as ice as the glacier grows.

[Hoosier-Daddy]

Ahem, ice age, glaciers covered a great deal of the land masses and were a mile deep. That’s a lot of melting water.

[aruanan]

I disagree with your concept that the seas have risen.

It's not a matter of being a "concept." The sea level has risen over 400 feet since the end of the last glaciation. Where was the water? Locked up in ice and snow, gradually lowering the seas over the ~100,000 years of the period of glaciation. This has happened at least 5 times over the past 600,000 years. During the previous (warmer) interglacial period, sea levels were ~13-20 feet higher than they are now. It was probably similar during the previous 3 interglacials to that, each of which was warmer than the preceding one (we're in the fifth, coolest, and longest of the current ice age).