For decades, for-profits and nonprofits have had conflicting goals. The goal of all for-profits has been – of course – to make money. The goal of nonprofits, however, has been to effect change, often with very limited budgets. The founders of nonprofits have also had an uphill battle as the idea of needing “charity” is often considered a weakness in self-sufficient America. Millennials, however, have been raised watching the coke-fueled excesses of the ‘80s, the 70-hour weeks of the ‘90s and their home-ownership dreams go up in smoke with the collapse of the mortgage industry in the 2000s. Millennials have had enough, and they want something more than just a big paycheck. As a result, the gap between for-profit and nonprofit is slowly narrowing.

By 2020, Millennials will be the largest demographic in the workplace, and that gives them a pretty powerful voice. They are also poised to become the most generous generation in history. This is also somewhat shocking considering they are generally saddled with more student loan debt than any other generation in history and have to wait significantly longer to make large purchases like a home or a new car.

In spite of that, however, Millennials don’t just want a big paycheck. They also want to know that the work they do matters and that they are making a difference in the world. This means that they expect even for-profit businesses to have a social mission and aim. Conversely, however, they also place greater expectations on organizations in the non-profit and charitable world to engage in greater transparency and deliver a significant ROI on charitable contributions.

This makes sense when you consider that the average college graduate in 2017 walked out into the world already roughly $40,000 in debt. When you have that much debt but manage to carve out a charitable contribution, you tend to want to know exactly what that money is being used for and that it is being put to good use. This is perhaps why organizations like Charity: Water are thriving, whereas larger, more established non-profits with a history of poor donation management are floundering. In the for-profit world, Millennials just can’t get enough of businesses like Apple and Starbucks that both have strong social missions that prove they aren’t just all about making money.

Many of America’s top philanthropists are probably familiar names to most people because some of them also happen to be the wealthiest billionaires in the United States. Icons such as Bill Gates, Warren Buffet and Mark Zuckerberg are not only famous for their wealth and their phenomenal companies, but they’re also top-notch when it comes to helping those in need. In fact, 40 of the highest givers are in the top 400 list of wealthiest Americans. This might come as a surprise to people who view rich people as misers or “Scrooges.”

For the fourth year in a row, according to Forbes, Warren Buffett is number one in total donations given in a single year. In 2017, he gave a total of $2.8 billion. Of this enormous contribution, $2 billion was given to the Bill and Melinda Gates Foundation. The rest was split between his own foundation, which was named after his late wife Susan Thompson Buffett, and three foundations that were established by his children.

In second place are Bill and Melinda Gates. They gave $2.5 billion in 2017 to a number of charities. The biggest donations went to the Global Fund to Fight AIDS, Malaria and Tuberculosis, the Alliance for a Green Revolution in Africa and the Gates Medical Research Institute. Bill and Melinda have donated over $35 billion through their foundation since 1994. The Bill and Melinda Gates Foundation is now the largest charitable organization in the world.

Third on the list is Michael Bloomberg who is famous for his influential financial information company. He also happens to be a former mayor of New York City. He gave over $702 million in charitable contributions in 2017 and has donated a total of more than $5.5 billion throughout his career. Some of his donations include efforts to support U.S. mayors, an initiative to reduce worldwide coal usage and other endeavors to support the arts and women’s programs in Africa.

The Walton Family, founders of the enormous Walmart company, are in fourth place for top philanthropists. Sam Walton established his charitable foundation in 1987, which was the 25th year after the Walmart stores were founded. His two children and three grandchildren currently oversee the foundation. The organization contributed $193 million in 2017 toward education and $146 million toward environmental and other local programs in Arkansas.