There’s something very dangerous happening in states across the country.

A wave of legislation, introduced in more than two dozen states, would allow people to discriminate against their neighbors. Some, such as the bill enacted in Indiana last week that drew a national outcry and one passed in Arkansas, say individuals can cite their personal religious beliefs to refuse service to a customer or resist a state nondiscrimination law.

Others are more transparent in their effort to discriminate. Legislation being considered in Texas would strip the salaries and pensions of clerks who issue marriage licenses to same-sex couples — even if the Supreme Court strikes down Texas’ marriage ban later this year. In total, there are nearly 100 bills designed to enshrine discrimination in state law.

These bills rationalize injustice by pretending to defend something many of us hold dear. They go against the very principles our nation was founded on, and they have the potential to undo decades of progress toward greater equality.

America’s business community recognized a long time ago that discrimination, in all its forms, is bad for business. At Apple, we are in business to empower and enrich our customers’ lives. We strive to do business in a way that is just and fair. That’s why, on behalf of Apple, I’m standing up to oppose this new wave of legislation — wherever it emerges. I’m writing in the hopes that many more will join this movement. From North Carolina to Nevada, these bills under consideration truly will hurt jobs, growth and the economic vibrancy of parts of the country where a 21st-century economy was once welcomed with open arms.

I have great reverence for religious freedom. As a child, I was baptized in a Baptist church, and faith has always been an important part of my life. I was never taught, nor do I believe, that religion should be used as an excuse to discriminate.

I remember what it was like to grow up in the South in the 1960s and 1970s. Discrimination isn’t something that’s easy to oppose. It doesn’t always stare you in the face. It moves in the shadows. And sometimes it shrouds itself within the very laws meant to protect us.

Our message, to people around the country and around the world, is this: Apple is open. Open to everyone, regardless of where they come from, what they look like, how they worship or who they love. Regardless of what the law might allow in Indiana or Arkansas, we will never tolerate discrimination.

Men and women have fought and died fighting to protect our country’s founding principles of freedom and equality. We owe it to them, to each other and to our future to continue to fight with our words and our actions to make sure we protect those ideals. The days of segregation and discrimination marked by “Whites Only” signs on shop doors, water fountains and restrooms must remain deep in our past. We must never return to any semblance of that time. America must be a land of opportunity for everyone.

This isn’t a political issue. It isn’t a religious issue. This is about how we treat each other as human beings. Opposing discrimination takes courage. With the lives and dignity of so many people at stake, it’s time for all of us to be courageous.