What determines left-handedness? When is the dominant hand determined?

What determines left-handedness?
When is the dominant hand determined?
Small inconveniences in daily life… Left-handed stories
August 13th every year is Left-handed Day. This day was established to eliminate prejudice against left-handed people and promote human rights.
It is said that about 7-10% of the world's population is left-handed.
Leonardo da Vinci, Alexander the Great, and Napoleon Bonaparte are all known to be left-handed.
Since most tools and cultures in society are made based on right-handed people, left-handed people may experience inconveniences in their daily lives.
However, it is not appropriate to discriminate against or look down on left-handed people for this reason, and an attitude of respect and consideration for their individual characteristics is needed.
#Left-handed #Left-handedDay #Leonardo da Vinci #Alexander the Great #Napoleon Bonaparte