Complexities

He dwelt on the complexities of modern life.

The road to simplicity is paved with hellish complexities.

The child who, say, from five to eight years old, can learn the game of chess will find it much easier than an adult to master the complexities of this game-science-art.

For a linguist, Tagalog's grammar may seem more complicated than English's or Chinese's. Yet, the complexities in Tagalog's grammar aren't so nit-picky, hair-falling-off like English's "their" versus "they're" versus "there" or "every day" versus "everyday."

It can be difficult to navigate the complexities of a new job.

They navigate the complexities of life with ease.

Science continues to explore the complexities of animal relationships.

Scientists continue to unravel the complexities of animal bonding.